MR2 Roadster Owners Club

Hi people.

We're getting asked more and more to recommend reliable generic O2 sensors. There's good, bad and ugly options out there: some are plug'n'play, some need wiring in, some are total pants.

Nuggets of info are everywhere. Its hard to keep track of current sources and even harder for "use the search" advice to be of any use whatsoever when members post up their woes.

So, lets get it all in one place. A heads-up on who/what to avoid is as useful as links to good stuff, so all experiences are welcomed.

Suggested format as follows:

Brand/Part number/description:
Purchased from:

(Link if possible)
When purchased: (mm/yy)
Price: (incl shipping and taxes as applicable)
Delivery time:
Ease of fitting: (plug'n'play?/requires wiring up?/needs extending for 3rd O2 position?)
Comments:[/list]

Hope you'll be able to spare a few minutes to get this rolling. Providing response isn't totally underwhelming  s:P :P s:P  , I'll top'n'tail the thread with info on codes, tests, resistor fixes, sensor sockets and other paraphernalia. Then we can get it stickied and point our members at it.   s:shock: :shock: s:shock:   s:lol: :lol: s:lol:  

Thanks
Ste

I got mine from a company in the US called Rock Auto (http://www.rockauto.com/)

It was the post-cat sensor P0141 which was the bother, these are the details (that i can remember)...

Brand/Part number/description: Beck Arnley - 1564171
Purchased from: Catalogue (http://www.rockauto.com/catalog/x,carcode,1432923,parttype,5132)
When purchased: June 2006
Price: Approx $110
Delivery time: 4 days
Ease of fitting: Plug & play, exactly the same as the one i took out just didn't have Denso stamped on it. The cable is spot on the right length and it even comes with the cable tie clips that go in the holes the original ones use. The plug goes straight in like the original.

Comments: Works a treat - no problems since then. This was my second go, I originally bought one of the Gendan "generic" items, that was useless!

 m http://info.rockauto.com/BeckArnley/Det ... 564171.jpg (http://info.rockauto.com/BeckArnley/Detail.html?1564171.jpg) m

i bought a generic one from ebay, again to solve the 0141 CEL.

it was about 15 pounds, and initially they sent me a 3 wire one.

i returned it, and they then sent a 4 wire one.

now, the old addage, you get what you pay for comes in here.  lots of tinkering under the car soldering this that and the other.

then, as you know. i needed a 40ohm resistor building into the circuit.

so all in all, its a cheap answer, but certainly not a plug and play option

J

i followed nicks advice after reading his post and got mine from rock auto as well about 3 weeks ago , delivered in 4 days no hassle and cost about £55.00   s:D :D s:D

Brand/Part number/description:

Denso Part #: 234-4624 OE Oxygen Sensor (Pre-Cat)
Purchased from: AutoMedicSupply (http://www.oxygensensors.com)
When purchased: 09/07
Price: $124 (~£60) (I was also stung with £20 customs tax by ParcelForce   s:evil: :evil: s:evil:  )
Delivery time: 2 weeks
Ease of fitting: Plug 'n' Play
Comments: P0135 code originally found. Swapped two pre cat sensors and code changed to alternate sensor side, so swapped in this OE sensor and all has been well since
[/list]

I'm disappointed, there seems to have been plenty of people who have complained about failed O2 sensors, asked for and eecieved advice - and yet...

Few can be bothered to volunteer information which will help future generations who run into the same problems!

Brand/Part number/description: Walker / 250-24200 / Universal
      Purchased from: AutoMedicSupply (http://www.oxygensensors.com)
      When purchased: November 2006
      Price: current price $49 + $25 shipping (converts to approx £38 NO DUTY)
      Delivery time: 5 days
      Ease of fitting: Chop wires to utilise original plug, wire crimps & heat shrink covers supplied PICTURE (http://i6.photobucket.com/albums/y234/SLAPA/Oxygen%20sensor/1.jpg)

Comments:

Although this was fitted to my wifes Celica, this is the same four wire sensor used by our 2002 onward models.
The instructions were very clear and  fitting is VERY easy.
Since fitting there has never been a problem.

I cured P136 with this £15 one from ebay

 m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=022 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=350025023728&ssPageName=STRK:MEWN:IT&ih=022) m

It threw a P141 after fitting but this was cured by fitting a 40p ceramic 15 ohm 10 watt resistor from Maplins. I fitted this by cutting the 2 same colour wires and crimping / bullet connectors across thewires back to the car with nothing going to the sensor.

No lcel ight now and a cheap fix.

Quote from: "dave_5150"It threw a P141 after fitting but this was cured by fitting a 40p ceramic 15 ohm 10 watt resistor from Maplins. I fitted this by cutting the 2 same colour wires and crimping / bullet connectors across thewires back to the car with nothing going to the sensor.

No lcel ight now and a cheap fix.

Which wires did you cut and where did you put the resistor?

Brand/Part number/description: as listed
Purchased from:  m http://www.lambdasensor.com/main/mindex.htm (http://www.lambdasensor.com/main/mindex.htm) m  
When purchased: April 08
Price: Range dependant on spec £50 to £95)
Delivery time: next day
Ease of fitting: plug and play included all new clips etc
Comments: The cheaper option i guess would require some jointing of wires. I ordered the specific exact one at the dearer price for 3rd sensor and fitted and worked perfectly

Not quite in the format Nic has asked for, but.....

For those running Innovate wideband LC1, you're probably aware that the Bosch sensor used is the upstream sensor from the VW Beetle (Turbo).

I priced this up and with VAT at mate's rates its £86.

There's a logistics company in Greece that acts as European distributor for Innovate, so they supply it badged with Innovate part number.

Free delivery within Europe - £70 all-in. Insured delivery and it takes about 3 days.

Search for "skotsaladis" on that auction site, or  m http://www.telematicagroup.com/ (http://www.telematicagroup.com/) m  

They do other stuff too   s8) 8) s8)

Mocom Racing (http://www.mocomracing.com) in the UK can supply a genuine Innovate wide-band sensor for £62.57 - got mine next day.

I have just bought one from Rock Auto, as in Wabbit's post.  Cost £84 inc postage, would be cheaper if the exchange rate improves.  I tihnk it arrived after about 3 days.

 m http://www.cats2go.co.uk/Default.aspx?P ... 5&CartID=1 (http://www.cats2go.co.uk/Default.aspx?PageID=15&CartID=1) m

(precat) Plug and play sensor. Bought - in haste - 2 days before my MOT in April this year for: £54.23 plus HEFTY postage charge which brought total to £67.14p. Can use Google checkout...received prompt delivery.

Quote from: "dave_5150"I cured P136 with this £15 one from ebay

 m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=022 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=350025023728&ssPageName=STRK:MEWN:IT&ih=022) m

It threw a P141 after fitting but this was cured by fitting a 40p ceramic 15 ohm 10 watt resistor from Maplins. I fitted this by cutting the 2 same colour wires and crimping / bullet connectors across thewires back to the car with nothing going to the sensor.

No lcel ight now and a cheap fix.

that ebay listing has been removed now m8, and yea i would like to know more bout this resistor fix thank you plz   s:D :D s:D   as i have found 1 i think might work on ebay for 15 quid. i have sent the seller a question to see if its compatible. soon as i sort my dodgey sensor out il post my findings too.  s:D :D s:D

Brand/Part number/description: Bosch universal sensor
Purchased from: Euro car parts
When purchased: early August this year
Price: £63 free delivery.
Delivery time: 2 days
Ease of fitting: i had to attach the original plug on to the the 4 wires for the sensor. i am not an electrically minded girl but i managed it in about 30 mins.
Comments:
i was really impressed with Euro Car spares, i ordered it over the phone along with the tackle for a service and got a huge discount and free postage.
when attaching the old sensor plug there was a moment of no return when i cut the wires fro the original sensor. but it all turned out well in the end. the engine light had been on since  the start of May with the code P0135 so when the sensor arrived i just wanted to put it in and i did, all on my own!!!

Just fitted one of these after developing P0136 fault
 m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 1725wt_939 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140336932084&ssPageName=STRK:MEWAX:IT#ht_1725wt_939) m
Its plug & play and was easy to fit after purchase of special socket tool
Have reset to clear management light and will let you know if everything seems ok

tennisfreak,

ive bought the same sensor and used it on my cat to solve a p0141 which still brings up the same problem, any news on how yours is running? ill be fitting the same sensor (i bought another one before i knew the other gave me grief) to solve a p0135.....

Quote from: "dipper84"tennisfreak,

ive bought the same sensor and used it on my cat to solve a p0141 which still brings up the same problem, any news on how yours is running? ill be fitting the same sensor (i bought another one before i knew the other gave me grief) to solve a p0135.....

Have been to work and back today (46 mile round trip) and back out briefly tonight
Management light still off, so hopefully sorted.
Think my P0136 was actually a P0135, (memory loss, it's an age thing   s:oops: :oops: s:oops: )
The car was recently serviced prior to me purchasing a reader and they advised it was bank 1 at fault
Did a bit of searching on here and I changed the one on the right as you look into the engine, Think that's the P0135 one
Well everything seems ok and will keep my fingers crossed that i've cured the problem and changed the right sensor............

tennisfreak,

ive just fitted the other sensor i bought from the same guy in the manifold and it it seems to work fine now, be must have got a non consistent batch?
bit stumped now as i have a spare one which is no good, i hear he has a returns policy so ill try take him up on that.

hey guys and gals,

with reference to my previous post on the sensors i bought off ebay which was £43 with correct connector, the guy sent me a new one to replace the dud one and it is in the car and working fine. had no issues with both sensors now so i can call it an and to my p0135 and p0141 saga!

Hope this helps....

Quote from: "tennisfreak"Just fitted one of these after developing P0136 fault
 m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 1725wt_939 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140336932084&ssPageName=STRK:MEWAX:IT#ht_1725wt_939) m
Its plug & play and was easy to fit after purchase of special socket tool
Have reset to clear management light and will let you know if everything seems ok

Management light back on with a P0135 code after only 3 weeks
Not too impressed   s:( :( s:(  
Will be contacting supplier and hopefully they will replace

oh dont say that! i hope my sensor works for a very long time........ grr!
btw tennisfreak, the seller sent me out a replacement one pretty much right away, but im not sure what he would say with yours as mine was dead from the start?

Tennisfreak, any news?

I have the dreaded P0135......

Quote from: "Stewarty"Tennisfreak, any news?

I have the dreaded P0135......

Just got back from Hols
Contacted the seller on Ebay who asked me to return the duff one
That I did on Monday and replacement  sensor was on the mat when we got back
Fitted it today, reset code, but not been out in car yet
Will let you know how it goes

This one is recommended by a member (forget who) on Spyderchat
 m http://www.amazon.com/Denso-234-4209-Un ... &carId=002 (http://www.amazon.com/Denso-234-4209-Universal-Oxygen-Sensor/dp/B000C5WCUE/ref=au_pf_ss_2?ie=UTF8&n=15684181&s=automotive&carId=002) m

Brand/Part number/description: Post Cat O2 sensor
Purchased from:  w www.automotiveonline.co.uk (http://www.automotiveonline.co.uk) w
When purchased: May(?) 2009
Price: £100 ish
Delivery time: 3 days
Ease of fitting: plug'n'play
Comments: also bought a new Cat from the same company, cheapest I could find for a straight swap £250 plus postage, had to make the holes slightly bigger to fit over the bolts from the manifold but otherwise was a good fit.

Quote from: "tennisfreak"Just fitted one of these after developing P0136 fault
 m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 1725wt_939 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140336932084&ssPageName=STRK:MEWAX:IT#ht_1725wt_939) m
Its plug & play and was easy to fit after purchase of special socket tool
Have reset to clear management light and will let you know if everything seems ok

I have messaged these about length of wire and they said "approx 70cm" so should be fine for 3rd post cat sensor.Can you confirm this length tennisfreak or anyone else that have bought one of these?

Quote from: "life of bryan"

Quote from: "tennisfreak"Just fitted one of these after developing P0136 fault
 m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 1725wt_939 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140336932084&ssPageName=STRK:MEWAX:IT#ht_1725wt_939) m
Its plug & play and was easy to fit after purchase of special socket tool
Have reset to clear management light and will let you know if everything seems ok

I have messaged these about length of wire and they said "approx 70cm" so should be fine for 3rd post cat sensor.Can you confirm this length tennisfreak or anyone else that have bought one of these?

Definately not 70cm long, more like 25, cable is short

Quote from: "life of bryan"

Quote from: "tennisfreak"Just fitted one of these after developing P0136 fault
 m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 1725wt_939 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140336932084&ssPageName=STRK:MEWAX:IT#ht_1725wt_939) m
Its plug & play and was easy to fit after purchase of special socket tool
Have reset to clear management light and will let you know if everything seems ok

I have messaged these about length of wire and they said "approx 70cm" so should be fine for 3rd post cat sensor.Can you confirm this length tennisfreak or anyone else that have bought one of these?

I cant remember the length, ill go check the car when i get a chance.
I used one of these for my precat and rear Cat, Even though the wire isnt as long as the original for the main cat, I fitted it by redirecting the wire from the socket to the cat instead of following where it went before. It seems to be working well, not had a warning in a good 3 / 4 weeks - 1000 miles.....

Mods feel free to move this if inclined!

I've been looking for a cheap 02 sensor for sometime as there is no way I'm paying
Mr T £180 or whatever...been the Ebay route got stiffed a couple of times....
The only guys I trusted were Ignition Parts in South Ockington at approx £92..good people.

Anyway, recently bought yet another Ebay special out of the States at £25 in total including postage (took about 10 days)... no duty.

Fitted it about 2 weeks ago.....no cel, no probs  so far....dare I say, looking good....
So much so,. I bought another one, at £25.....I can live with a spare.

I emailed the guy, asked about more....referenced some other guys/dames might be interested....he confirmed no problem...

Please be aware, my experiece has been nothing but positve....if interested, please bare in mind, you pays yer money, you take yer chance..at £25 it's hardly huge exposure.

If interested:
Ebay uk
Item number: 350168637474
It's advertised for a Corolla....I emailed with payment, told him it was for the MK3 Roadster Mrs Spyder.

B

 [MOD=roger] Merged with other o2 options

Quote from: "wbarrwebster"Mods feel free to move this if inclined!

I've been looking for a cheap 02 sensor for sometime as there is no way I'm paying
Mr T £180 or whatever...been the Ebay route got stiffed a couple of times....
The only guys I trusted were Ignition Parts in South Ockington at approx £92..good people.

Anyway, recently bought yet another Ebay special out of the States at £25 in total including postage (took about 10 days)... no duty.

Fitted it about 2 weeks ago.....no cel, no probs  so far....dare I say, looking good....
So much so,. I bought another one, at £25.....I can live with a spare.

I emailed the guy, asked about more....referenced some other guys/dames might be interested....he confirmed no problem...

Please be aware, my experiece has been nothing but positve....if interested, please bare in mind, you pays your money, you take your chance..at £25 it's hardly huge exposure.

If interested:
Ebay uk
Item number: 350168637474
It's advertised for a Corolla....I emailed with payment, told him it was for the MK3 Roadster Mrs Spyder.

B

 [MOD=roger] Merged with other o2 options

Can you tell us how you wired it(i.e. which colour wire to which wire)?

HI,

The wiring details are on the EBay site, if you have a problem, just shout!

As stated, the EBay auction is for a 02 Oxygen Sensor 130hm 4w SG471 but I said I wanted one for the MRS.....

The one I originally received is working sofar whether it's a 130hm 4W  who knows....

Meant to say, the guy states a 90 day Warranty, whether that's enforceable in the UK.....is questionable!

B

Found this plug and play for the Mk3 MR2 if someone wants to be 1st to try it although i dont know how long the lead is for possible 3rd sensor replacement.UK next day supplier too.
 m http://cgi.ebay.co.uk/Toyota-MR2-Lambda ... _500wt_956 (http://cgi.ebay.co.uk/Toyota-MR2-Lambda-Sensor_W0QQitemZ180428519233QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item2a0260b741#ht_500wt_956) m

Denso OEM quality one's in the UK for £63 here:   m http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 1666wt_939 (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=220508980621&ssPageName=STRK:MEWAX:IT#ht_1666wt_939) m

Hmm....

This is interesting, there seems to be afew half decent /branded 02 sensors coming out at about £70... This last mob referred to above are allegedly marketing a 02 sensor for a 6th Gen Honda Accord at more than Honda!!

It don't figure!!

B

Hi,

Bought 2 O2 sensors from Amazon, Denso universal 234-4209 for just under $US 40.- each. They wouldn't ship to Australia so i had them shipped to a contact in NY for next day delivery.
They work fine and the wire colours are the same as on the original ones so the match up is easy

(http://i498.photobucket.com/albums/rr348/Sepp_album/P1030182.jpg)
(http://i498.photobucket.com/albums/rr348/Sepp_album/P1030183.jpg)

Couple of queries on this if someone can help - MR2 noob  s;) ;) s;)

1. Are all three sensors the same ( can I order 3 universals to replace both precats and the post cat )?

2. Are the sensors the same for all years of roadster? I have a 2001 and saw someone mention their 03 model, so I just want to double check.

Bought the car 3rd hand and am slowly undertaking an update/cleanup - so getting these changed out and then replacing manifold seem like a good place to start as I have a mil light on at the moment and MAF clean didn't sort it.

Hi Crazy6 welcome,

The sensors are all the same apart from the post cat sensor has a longer lead. The universal sensors often dont come with a plug on the end, so you have to splice the wires together. They are the same for all years of roadster.

I recently did a group buy on Denso Sensors (the same that Toyota use) I can still get hold of the sensors at less than half the price than from Toyota. If you interested PM me and ill see what the stock is like. Plenty of guys have had them off here with no issues at all. Ive also had one fitted for 300+ and its working just fine.

Heres the group buy link  l viewtopic.php?f=36&t=28730 (http://www.mr2roc.org/phpBB3/viewtopic.php?f=36&t=28730) l

I can vouch for that! fitted post cat myself , after Nathan kindly sourced one for me!

Quote from: "dipper84"

Quote from: "life of bryan"

Quote from: "tennisfreak"Just fitted one of these after developing P0136 fault
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140336932084&ssPageName=STRK:MEWAX:IT#ht_1725wt_939
Its plug & play and was easy to fit after purchase of special socket tool
Have reset to clear management light and will let you know if everything seems ok

I have messaged these about length of wire and they said "approx 70cm" so should be fine for 3rd post cat sensor.Can you confirm this length tennisfreak or anyone else that have bought one of these?

I cant remember the length, ill go check the car when i get a chance.
I used one of these for my precat and rear Cat, Even though the wire isnt as long as the original for the main cat, I fitted it by redirecting the wire from the socket to the cat instead of following where it went before. It seems to be working well, not had a warning in a good 3 / 4 weeks - 1000 miles.....

After a good few months now I havent had a problem untill now, supprise supprise both of my sensors have failed at the same time! (well within days) Whats the chances of that happening?! Could this have something to do with the car electronics?

Looking to buy another recommended one this time....

What sort was it you brought? Was it a Denso?

I should still be able to get Denso sensors if your interested PM me and ill check stock for you.

Got a Denso sensor for a bargain price me thinks!

Brand/Part number/description: DOX-0204 for the shorter sensor, DOX-0206 for Post cat sensor.
Purchased from:  w www.sparkplugs.co.uk (http://www.sparkplugs.co.uk) w  
When purchased: June 2010
Price: Approx £58.71 delivered!
Delivery time: 2 days
Ease of fitting: Plug & play. Got the shorter cable which was the perfect length, but they also sell the longer sensor for the same price.

Comments: Driven 50 miles and no problem so far.  s:D :D s:D

Quote from: "m312"Got a Denso sensor for a bargain price me thinks!

Brand/Part number/description: DOX-0204 for the shorter sensor, DOX-0206 for Post cat sensor.
Purchased from:  m http://www.sparkplugs.co.uk (http://www.sparkplugs.co.uk) m  
When purchased: June 2010
Price: Approx £58.71 delivered!
Delivery time: 2 days
Ease of fitting: Plug & play. Got the shorter cable which was the perfect length, but they also sell the longer sensor for the same price.

Comments: Driven 50 miles and no problem so far.  s:D :D s:D

Sounds like a great deal you got their mate

Hi all

I got mine from http://www.eurocarparts.com
Brand/Part number/description: Denso post cat sensor. Euro Car Parts part no. 710828205
Purchased from: EuroCarParts
When purchased: 17/06/10
Price: £65.69 (incl VAT & delivery)
Delivery time: 2 days
Ease of fitting: Plug 'n' Play.  Easy peasy
Comments: P0141 code. Straight P & P no probs at all.  Only problem was getting the clips that hold the old sensor cable off!

Hi all,

Are the Denso ones that are available from sparkplugs.co.uk the same as the OEM sensors? Just picked up the phone to my local Mr T (Hills, Bishops Stortford, Essex) who quoted me £193 each!!!! To be able to buy them at 25% of that seems a bit too good to be true and in my experience thats because it usually is!!!


Cheers,
Andy

Quote from: "Innocent"Hi all,

Are the Denso ones that are available from sparkplugs.co.uk the same as the OEM sensors? Just picked up the phone to my local Mr T (Hills, Bishops Stortford, Essex) who quoted me £193 each!!!! To be able to buy them at 25% of that seems a bit too good to be true and in my experience thats because it usually is!!!


Cheers,
Andy

More or less. Absolutely zero issues with them, perfect swap.

Hi Folks

I have had my head turner (sorry my wifes car as she keeps reminding me) for a couple of months now.
The engine light has came on so I purchased an OBD2 reader which gave me a P0155 fault.

After reading posts on here about the error code I have decided to replace the near side pre cat sensor (hope its the correct one).

Brand/Part number/description: Denso pre cat sensor. Euro Car Parts part no. 710828405
Purchased from: EuroCarParts
When purchased: soon
Price: £65.69
Delivery time: will go and pick it up
Ease of fitting: dont know yet
Comments: OBD2 Code P0155

Regards,
New Member

Yep, looks like the correct one. You'll need a 22mm lambda sensor socket if you don't already have one. £5 on ebay (link below). Really easy to do. How to guide below. Just ignore the bit about swapping over the connector.


 m http://shop.ebay.co.uk/i.html?_nkw=22mm ... m270.l1313 (http://shop.ebay.co.uk/i.html?_nkw=22mm+lambda+sensor+socket&_sacat=0&_odkw=lambda+sensor+socket&_osacat=0&_trksid=p3286.c0.m270.l1313) m

 l viewtopic.php?f=47&t=21462 (http://www.mr2roc.org/phpBB3/viewtopic.php?f=47&t=21462) l

Got up this morning with nothing to do so I decided to go and get the O2 sensor and a radiator which has spung a leak.
Fitted the sensor in 10min, didn't have the lambda sensor socket but a 22m offset ring spanner done the job.
Reset the light using the OBD2 tool and went for a 50mile run, all seems to be ok so far.

Thanks for the links Russell.

Next job is the radiator but its not leaking that bad - I will get this sorted within the next month.


Dom.....

I have a 2002 Roadster that I have been running around in for some time with the engine management light illuminated but the original diagnosis from Abbey Toyota was that it was a faulty oxygen sensor on Bank 1 Sensor 1 but they didn't give me the error code.  I asked them what the code was today but they hadn't kept it from what was admittedly quite a long time ago.  Clearly briliant value for £40 odd quid of diagnosis.  s:roll: :roll: s:roll:  

So which of these reasonably priced sensors mentioned a couple of posts above do I need for Bank 1 Sensor 1?   Is it the long or the short sensor and/or what is the product code.

The car is currently in for some major bodywork repairs and these guys are also attending to annoying things like water leaks and the oxygen sensor at the same time.  At this price it probably isn't worth bridging out the heater circuit with a resistor although I wonder if it wasn't this oxygen sensor that also failed before when the car was four years old and if this heater circuit won't fail yet again some time so perhaps bridging it with a resistor would be better or is that no good on the Bank 1 Sensor 1 unit?   Last time Mr T paid half the cost for the new O2 sensor as a good will gesture (the car was then four years old) as I was pretty angry about the part and labour cost for replacing what is clearly a consumable that needs to be replaced several times in the life of the car.

Brand/Part number/description: Denso Part #: 234-4209 Oxygen Sensor (Pre-Cat)
Purchased from: AutoMedicSupply
When purchased: 20/11/10
Price: $120.84 - about £78. (Excluding £20 customs tax)
Delivery time: 12 days (Maybe less if we didn't have snow)
Ease of fitting: Had to crimp/solder original connectors as the new sensors come with flying leads...

No problems so far...

Quote from: "weddallenko"Brand/Part number/description: Denso Part #: 234-4209 Oxygen Sensor (Pre-Cat)
Purchased from: AutoMedicSupply
When purchased: 20/11/10
Price: $120.84 - about £78. (Excluding £20 customs tax)
Delivery time: 12 days (Maybe less if we didn't have snow)
Ease of fitting: Had to crimp/solder original connectors as the new sensors come with flying leads...

No problems so far...

I don't see the point then compared to offering the same Denso sensor at a cheaper price from a British supplier?  Also I would suggest delivery will be a lot more than 12 days at the moment with the snow and xmas presents going through the mail in large numbers.

Quote from: "Capvermell"

Quote from: "weddallenko"Brand/Part number/description: Denso Part #: 234-4209 Oxygen Sensor (Pre-Cat)
Purchased from: AutoMedicSupply
When purchased: 20/11/10
Price: $120.84 - about £78. (Excluding £20 customs tax)
Delivery time: 12 days (Maybe less if we didn't have snow)
Ease of fitting: Had to crimp/solder original connectors as the new sensors come with flying leads...

No problems so far...

I don't see the point then compared to offering the same Denso sensor at a cheaper price from a British supplier?  Also I would suggest delivery will be a lot more than 12 days at the moment with the snow and xmas presents going through the mail in large numbers.

Forgot to say the price was for two sensors...

Quote from: "Capvermell"I have a 2002 Roadster that I have been running around in for some time with the engine management light illuminated but the original diagnosis from Abbey Toyota was that it was a faulty oxygen sensor on Bank 1 Sensor 1 but they didn't give me the error code.  I asked them what the code was today but they hadn't kept it from what was admittedly quite a long time ago.  Clearly briliant value for £40 odd quid of diagnosis.  s:roll: :roll: s:roll:  

So which of these reasonably priced sensors mentioned a couple of posts above do I need for Bank 1 Sensor 1?   Is it the long or the short sensor and/or what is the product code.

The car is currently in for some major bodywork repairs and these guys are also attending to annoying things like water leaks and the oxygen sensor at the same time.  At this price it probably isn't worth bridging out the heater circuit with a resistor although I wonder if it wasn't this oxygen sensor that also failed before when the car was four years old and if this heater circuit won't fail yet again some time so perhaps bridging it with a resistor would be better or is that no good on the Bank 1 Sensor 1 unit?   Last time Mr T paid half the cost for the new O2 sensor as a good will gesture (the car was then four years old) as I was pretty angry about the part and labour cost for replacing what is clearly a consumable that needs to be replaced several times in the life of the car.

is your car idling correctly?

Quote from: "scipio"

Quote from: "Capvermell"is your car idling correctly?

Yes its idling fine as per normal and the fuel consumption also hasn't change from the normal level.

My CEL has recently come on and I anticipate an O2 sensor failure, so have been doing a little research and found Plug and play O2 sensors can be bought from a company caled Lambda Power ( m http://www.lambdapower.co.uk (http://www.lambdapower.co.uk) m ) @ £72.99 each (Inclusive or VAT & delivery):

LP040279 - Front / 4 wire / 330mm

LP-40280 - Rear / 4 wire / 640mm

They will replace faulty products for a period of 1 year from purchase.  They advertise that they stock NGK, Bosch, Denso Delphi and Facet sensors.

Had to buy 2 sensors (bank 1 and bank 2 sensor 1) as I was replacing my PPE manifold with a turbo kit and needed to get back to a 2 sensor set up. Found Denso DOX-0204 on the SparkplugsUK website at £48 +VAT each. Delivery was next day, sensors in and working with no issues.

For anyone looking at the post cat sensor, it is DOX-0206 and is the same price.

Chris

i bought a denso 40 dollar o2 sensor and i still get the p141 heater error every once in a while but it clears on its own in a short while. it hasn't gone into error for a long time now????

All 3 of mine (er, the missus's) O2s were knackered so I replaced them with generic ones about a year ago.  Not sure what make or model but the 2 top ones have gone again so I am replacing all 3 to be safe.

Just ordered them from sparkplugs.co.uk for £144 plus £6.70 delivery. Fingers crossed!!!!!

Does anyone know of any O2 bypass plugs for the MR2?  I use them all the time on bikes and generally they run better as the fuelling is nearer the ideal 12.8:1 than the 15-or-so:1 you get below 4000RPM with the sensors in place.

Quote from: "Plipton"All 3 of mine (er, the missus's) O2s were knackered so I replaced them with generic ones about a year ago.  Not sure what make or model but the 2 top ones have gone again so I am replacing all 3 to be safe.

Just ordered them from sparkplugs.co.uk for £144 plus £6.70 delivery. Fingers crossed!!!!!

Why would you replace more than the sensors that have currently gone when the setup on the MR2 is proven to fry sensors repeatedly.   You are not going to make them last any longer by replacing all three at once.

I ran with Bank 2 Sensor 1 failed for several thousand miles and the only difference is that the fuel consumption is 5% to 10% higher than it might otherwise be.  The car still runs smoothly and accelerates as normal.

No other car seems to regularly destroy its o2 sensors in the way the mr2 roadster does.  The fact that Toyota charges the prices it does for these sensors when it is selling them in such quantity is a complete and utter disgrace.

Quote from: "Capvermell"

Quote from: "Plipton"All 3 of mine (er, the missus's) O2s were knackered so I replaced them with generic ones about a year ago.  Not sure what make or model but the 2 top ones have gone again so I am replacing all 3 to be safe.

Just ordered them from sparkplugs.co.uk for £144 plus £6.70 delivery. Fingers crossed!!!!!

Why would you replace more than the sensors that have currently gone when the setup on the MR2 is proven to fry sensors repeatedly.   You are not going to make them last any longer by replacing all three at once.

I ran with Bank 2 Sensor 1 failed for several thousand miles and the only difference is that the fuel consumption is 5% to 10% higher than it might otherwise be.  The car still runs smoothly and accelerates as normal.

No other car seems to regularly destroy its o2 sensors in the way the mr2 roadster does.  The fact that Toyota charges the prices it does for these sensors when it is selling them in such quantity is a complete and utter disgrace.

I know what you mean - do I spend £150 on sensors which will last maybe 2 - 3 years or accept a 10% increase in fuel consumption (@ £9 a gallon these days FFS!!!)?  In terms of cost it's a close call.  I'd like to get rid of the damn things altogether and use O2 eliminators like I have on my bikes, but for now, as all 3 are either dead or very close to dying, we've decided to bite the bullet and replace.  It will also be nice to have the idle back where it should be too.

Well, they were out of stock 2 weeks ago but they arrived today and were fitted this evening.  

One of those specific O2 sensor sockets did for the top ones, but the trusty offset 22mm ring spanner was the order of the day for the post-cat sensor.

A quick 30 minute blast and all OK - the light would come on after 5 mins previously - and the idle is back at 1000 rpm

Job's a good 'un.  Thanks for the link to  w www.sparkplugs.co.uk (http://www.sparkplugs.co.uk) w     s:D :D s:D

Quote from: "Plipton"Well, they were out of stock 2 weeks ago but they arrived today and were fitted this evening.  

One of those specific O2 sensor sockets did for the top ones, but the trusty offset 22mm ring spanner was the order of the day for the post-cat sensor.

A quick 30 minute blast and all OK - the light would come on after 5 mins previously - and the idle is back at 1000 rpm

Job's a good 'un.  Thanks for the link to  m http://www.sparkplugs.co.uk (http://www.sparkplugs.co.uk) m     s:D :D s:D

Plipton, Which Sensor did you buy? Im looking for one on that site and wondered what other people experiences were? Is the new sensor working fine?

Im fed up of these blasted sensors, my car chews through them like theyre going out of fashion!

Quote from: "dipper84"Plipton, Which Sensor did you buy? I'm looking for one on that site and wondered what other people experiences were? Is the new sensor working fine?

I'm fed up of these blasted sensors, my car chews through them like theyre going out of fashion!

I got 2 X DOX-0204 which have the short leads and fit in the manifold and 1 X DOX-0206 for the lower/rear.

They've been fitted for a few days now and so far no problems at all.  Tick-over is back down to just under 1000rpm and no lights on the dash  s:) :) s:)

Ah good stuff, Today I hope to switch the sensors around to see if it is the sensor which is faulty rather than the harness? just trying to go through a process of elimination as Bank 1 always seems to go while the others are less frequent.

Quote from: "dipper84"Ah good stuff, Today I hope to switch the sensors around to see if it is the sensor which is faulty rather than the harness? just trying to go through a process of elimination as Bank 1 always seems to go while the others are less frequent.

I think its long been established that it is the heater circuit in the sensors that is the main point of failure and that there is nothing with the wiring looms to the sensors.

Bank 1 Sensor 1 presumably fails the most often as it is the sensor that gets get hottest and/or has the least ventilation to keep it cool when the car is in use.

Tidy, Ive just changed the sensor over and had a P0155 suggesting the sensor is duff..... Time to get a new Denso one  s:o :o s:o )

Just fitted a Denso DOX-0204 to the car.... lets hope it works as the previous 'new' one which didnt work was a Denso (but it had the longer cable)

Put in the new Denso sensor yesterday lunch time and it has once again given me an error code P0155? Why is this? I am getting so annoyed and frustrated with this situation. This is the sencond brand new sensor the car doesnt like....
Has anyone had this probelm and know of overcoming it?

Sounds like you changed the wrong one.  Are you sure it's not the DOX 0206 underneath that's gone? My stealer didn't even know this one existed (so I won't be going there again!)

The light will, of course, reset for a few miles so I suspect very much that this is the case with your car.

Well I removed the sensor giving me the P0135 and swapped it with the other sensor visable from the engine bay, this giving me a P0155 as expected. Its so annoying that with 2 brand new Denso sensors it has refused to accept. Do I need to 'tune' or program the ECU? I just dont know what to do....

Disconnect the battery for 1 hour to reset the ECU - but if there's still a faulty sensor it'll come back on.

If you have access to an ODBII reader it might be worth looking again to check there's nothing else playing up I suppose.

Fingers crossed it'll get sorted. We ended up replacing all 3 as there were 2 intermittent sensors and 1 dead

I have an OBDII reader thats how I know whats going wrong. I will have a sensor reshuffle again and see what I gain from that... cant see much but Im lost for ideas.....

Quote from: "dipper84"I have an OBDII reader thats how I know whats going wrong. I will have a sensor reshuffle again and see what I gain from that... cant see much but I'm lost for ideas.....

What happened with your problems on this in the end?

I have just replaced the Bank 2 Sensor 1 sensor (the one on the top of the left of the manifold looking at the engine bay from the back of the car) with a DOX-0204 from  m http://www.sparkplugs.co.uk (http://www.sparkplugs.co.uk) m  but the engine management light came back on in the end after 300 miles but is now showing the code for Bank 1 Sensor 1.  This sensor is a sensor that a garage doing a lot of work for me replaced with a third party clone only 6 months ago and cut and spliced the wiring on.  I suspect the engine management computer objects to it not being up to OEM spec even though it appears to be largely doing the job given that I now getting nearly 30mpg on fuel consumption compared to 24mpg when Bank 2 Sensor 1 was faulty.

Anyhow I plan to get another DOX-0204 and replace Bank 1 Sensor 1.  I hope that Bank 1 Sensor 2 does not then also turn out to be faulty as if it does I think I will have to enlist a garage to fit one due to the inaccessible location and the fact it is the original nine year old sensor and has never been changed.

The fault on the Bank 2 Sensor 1 was only the heater circuit code so I find it odd that fitting a new one has caused such a drastic fuel consumption improvement even though the engine still ran smoothly and idled ok with the one with the faulty heater circuit.

Brand/Part number/description: Denso Part #: 234-4624 OE Oxygen Sensor (Pre-Cat)
got from ebay.
cost £64

I read on loads of posts that having used any type of Oxygen Sensor apart from what i ordered you will still get the horrid p0135 error & others, that no good , also was told this is due to cheap Oxygen Sensor putting out to much current or less current, i played safe got the real thing as advised.

2 years warranty as well.

These are the dreaded code your get with cheap 02 sensors.

    P0135 drivers side position. (o2 sensor heater malfunction (bank 1 sensor 1)

    P0141 passengers side position. (o2 sensor heater malfunction (bank 1 sensor 2)

    P0155 passengers side down below exhaust position. (o2 sensor heater malfunction (bank 2 sensor 1)

all the best redarrow.

Hi,

Ebay Generic 02 sensor for Toyota MR2/MRS = Crap!. It was only £15 quid but it caused more issues than it solved, even with a resistor. This was returned for a refund. I was quite lucky to find a crashed 2 being broken that had two brand new sensors in it, £20 quid each.

I've tried a couple of OBD scanners and have not had a great deal of succcess with the cheaper 'ebay type'. I eventually invested in an OBDKEY bluetooth scanner, Good software and spot on diagnosis with the sensor issues. It also does live testing of water temp, throttle response, oil, revs, etc etc etc. You can monitor as you drive as well (obviously with the aid of another person)it even brings up the chassis number from the ECU if its available!.

I've found that clearing the fault codes with a scanner after fitting the sensor rather than waiting for the ECU to respond helps.

Clearing the codes with your scanner may be quick. I would still reconmend resetting the ecu as it is now learning fuelling from new sensors and will likely take longer to get the a/f ratio fully settled. It's not a big problem unless the generic sensors were way off.

Sent from a planet somewhere nearby

I got a denso universal 4 wire ones off amazon and it was real easy to fit, cleared the codes straight away, not too bad price and delivered within a week.

 m http://www.amazon.com/Denso-234-4209-Un ... B000C5WCUE (http://www.amazon.com/Denso-234-4209-Universal-Oxygen-Sensor/dp/B000C5WCUE) m

Hi guys just ordered my o2 sensor from eurocarparts after having the P0125 code up.

Going for £82 for a denso one but having discount from another car club saved me 25% bring the price down to 62 delivered.

Code is brisk25. Hope this helps a few people out  s:) :) s:)

Stephen

Got a Denso one fro here  m http://www.sparkplugs.co.uk/pages/prici ... rs-ccp.asp (http://www.sparkplugs.co.uk/pages/pricing/ccp/Denso-Lambda-Sensors-ccp.asp) m    After being advised buy a fellow forum member, £62 delivered.

Bought on from here about this time last year, still going strong.
 m http://www.lambdasensor.com/ (http://www.lambdasensor.com/) m

Cost around £60.00 and was marked DENSO when i looked at it. Identical to the one it replaced.Took around 2 days to arrive. Matched up the part number from the Toyota reference i got from the stealership.

Quote from: "stevobeavo"Hi guys just ordered my o2 sensor from eurocarparts after having the P0125 code up.

  s:shock: :shock: s:shock:  

Hoping this is a typo and you mean P0135 or 0155?

Hi

My first ever engine light came on Monday, after 47,000 miles.
Dug out the reader, P0135
Quick google took me to  m http://www.sparkplugs.co.uk (http://www.sparkplugs.co.uk) m
Ordered Denso DOX-0204
£62, delivered the next morning, fitted 5 minutes later, job done

The Denso sensor was identical to the Toyota stamped unit it replaced
Why bother with Generic stuff of ebay, when the right kit is so readily available

I spent more time looking for the damned code reader, than it took to research, order and fit.

Job done.

I bought original i think rear with long cable rather than the short and they work well but not looking the same as the original.   s:bounce: :bounce: s:bounce:

Quote from: "m312"Got a Denso sensor for a bargain price me thinks!

Brand/Part number/description: DOX-0204 for the shorter sensor, DOX-0206 for Post cat sensor.
Purchased from:  m http://www.sparkplugs.co.uk (http://www.sparkplugs.co.uk) m  
When purchased: June 2010
Price: Approx £58.71 delivered!
Delivery time: 2 days
Ease of fitting: Plug & play. Got the shorter cable which was the perfect length, but they also sell the longer sensor for the same price.

Comments: Driven 50 miles and no problem so far.  s:D :D s:D

Fantastic, just what I need for SWMBO's car.
Nice Avater too  s;) ;) s;)

All I can say is I fitted Densos from Sparkplugs .co.uk(fast delivery),after usual codes detected and have had no problems since...I would not think of purchasing any other sort,from anywhere else!!!  s:wink: :wink: s:wink:

Changed my top O2 sensor today (DOX-0204).
Just wanted to add that it was my 1st attempt - easy with the correct tooling & advice from here.
Needed to gently tap the O2 socket onto the O2 sensor - very tight fit otherwise.
Followed the advice - bought Denso & a OBD2 reader.

Anyone tried these bosch sensors.. eBay item number: 161250037798

My experience of bosch stuff in the past has always been good and £16.00 for a 4 wire seems good even if it only lasts 12 months..

Hi guys, just doing some research on 02 sensors, i realise there are three sensors total , are all three sensors identical if and when they are replaced ? , thanks

Quote from: "sussex"Hi guys, just doing some research on 02 sensors, i realise there are three sensors total , are all three sensors identical if and when they are replaced ? , thanks

I believe (from previous posts) that all three have the same sensor but the cable lengths are different.

ok thanks for reply, just swatting up ready for when it happens, will be buying a code reader as this seems like a must have in a mr2 owners toolkit.   s:) :) s:)

Can anyone recommend a code reader, seen alot on ebay but most say from 2001 onwards my car is a 2000, would these code readers still work with my car ?

No reason why it shouldn't work. I have used the same code reader on my 2000 and my 2001.

Thanks Stu

Stu one of the sellers on ebay came back to me and said the code reader would not be suitable for a 2000 year mr2, could you let me know what make you use, cheers David

Mine is an Autosnap CR800, there only appears to be 1 on ebay atm for £25. If you look for OBD2 you'll find loads and loads.

OBD2 has been around since 1996, so there is no reason it shouldn't work.
In 2001, EOBD had to be implemented by OEM's for all petrol cars. The technology for OBD2 and EOBD are the same
"The technical implementation of EOBD is essentially the same as OBD-II, with the same SAE J1962 diagnostic link connector and signal protocols being used."
It might be that they

Thanks again Stu for the information, will look into it, cheers David.

Bought a DOX 0204 for my Rav4 yesterday....£55 from Amazon......Opie oils are doing them as well at that price.

good price that.

Quote from: "Markb"Bought a DOX 0204 for my Rav4 yesterday....£55 from Amazon......Opie oils are doing them as well at that price.

Thanks for the tip Markb, just ordered one from Amazon.

Just bought mine from Rock Auto in the states, bargain! Lets see if i get hit with duty   s:roll: :roll: s:roll:
(http://images.tapatalk-cdn.com/15/04/28/23ce3d1501654caa4f0fdba898fcf588.jpg)

Ok so got the sensors yesterday and paid nothing else!! Bargain of the century!

Fitted them today and well erm.. i dunno what to say.

good points: car idles nice, quieter through the revs, easier to take of, bo flat spot low down the revs, smoother driving. Very quiet on idle.

Bad points: not sure the above are good points! Feels like i lost 25bhp along with the torque! The car was like a wild stallion before and now like a tame puppy  s:( :( s:(

I am going to see what sort of MPG gains i get and if they are not massive the knackered sensors are going back in!!! Or better still bungs!

Would resetting the ECU help?

Louis

Any opinions on this cheap and cheerful one from China?

 m http://www.ebay.co.uk/itm/89465-52050-O ... 234fbd95d4 (http://www.ebay.co.uk/itm/89465-52050-O2-Lambda-Sensor-Rear-for-Toyota-Avensis-2-0-2-4-Camry3-0-Carina-2-0-/151661680084?hash=item234fbd95d4) m

touch and barge pole come to mind
Only my opinion though  s:) :) s:)

My recently purchased MR2 had 3 x ebay copy's lamdas.   Wires professionally soldered onto the OEM plugs and insulated.

The CAT sensor failed 1 week after I bought it.  Heater broke and then iffy readings.  Replaced with Denso.
The Mani sensors so far are okay, but I have had heater and slow response codes for one of them which cleared themselves after I fixed the cat sensor.

At £35 each I'd say pay the extra £30 for densos.

CrazySX, how did your cheapies from Rock Auto hold up?

I just bought a Denso DOX-0204 on ebay from Opie Oils for £56 including delivery. Every little helps!

Quote from: "insx"I just bought a Denso DOX-0204 on ebay from Opie Oils for £56 including delivery. Every little helps!

56... how much? is that for a pair or one?

The cheapies are doing a great job! no sign of rough running or an EML yet  s:) :) s:)

£56 was only for one. I'm debating whether to do the resistor "fix" or get a cheap one for the post cat sensor. If I go to Rock Auto, I will probably get a spare. They have lots of types to choose from!

Quote from: "insx"£56 was only for one. I'm debating whether to do the resistor "fix" or get a cheap one for the post cat sensor. If I go to Rock Auto, I will probably get a spare. They have lots of types to choose from!

What is the resistor fix? I couldn't justify spending over £100 on sensors when I could put that towards springs, or brakes  s:D :D s:D

Quote from: "CrazySX"

Quote from: "insx"£56 was only for one. I'm debating whether to do the resistor "fix" or get a cheap one for the post cat sensor. If I go to Rock Auto, I will probably get a spare. They have lots of types to choose from!

What is the resistor fix? I couldn't justify spending over £100 on sensors when I could put that towards springs, or brakes  s:D :D s:D

I've read around these parts that the post cat sensor can have a 15 ohm resistor fitted into the wiring to clear the fault. I believe it fools the ECU rather than actually fixing anything so I'm not sure why it is thought that this sensor is unimportant. The resistor needs to be 10 watt or 25 watt depending on which post you read. I'm still not exactly sure how to wire it.

i think if you have precats then you don't need the post cat, and vice versa, hence you don't need a sensor and hence you fool the ECU  s:) :) s:)

This is probably what i will do once i put my turbo manifold in .

I think this resistor should do the job if you're not in a big hurry:  m http://www.ebay.co.uk/itm/161102023184 (http://www.ebay.co.uk/itm/161102023184) m

I replaced my sensor on top with a proper Denso but for the lower one, I have used an Ultra-Power UP 234-4603 from Rock Auto. I bought 2 for a total of £31.86 delivered (no duty paid). It seems to be doing something according to Torque and it has a year's warranty. The cable is the long type and it was plug and play. Delivery took 1 week.

(http://i1322.photobucket.com/albums/u563/insx72/Forums/O2-rock-auto%20Large_zpss7cniptv.jpg) (http://s1322.photobucket.com/user/insx72/media/Forums/O2-rock-auto%20Large_zpss7cniptv.jpg.html)

(http://i1322.photobucket.com/albums/u563/insx72/Forums/Rock%20Auto%20Order%20Cropped_zpsg8j72lmh.jpg) (http://s1322.photobucket.com/user/insx72/media/Forums/Rock%20Auto%20Order%20Cropped_zpsg8j72lmh.jpg.html)

Dreaded engine management light has appeared so if there is anyone with a reader who can confirm the O2 sensor has died that would be a great help (West Mids/Black Country/Worcester areas).

Thanks

Nathan helped me out with reading the fault (my hero) and confirmed that it was P0136 - Bank 1 Sensor 2.

I'm going to order a new Denso one from sparksplugs.co.uk but I'm not sure which is the correct one. Does anyone know the product code?

Thanks

Quote from: "Standard"Nathan helped me out with reading the fault (my hero) and confirmed that it was P0136 - Bank 1 Sensor 2.

I'm going to order a new Denso one from sparksplugs.co.uk but I'm not sure which is the correct one. Does anyone know the product code?



Thanks

DOX 0204 ---the top two (pre Cat)

DOX 0206--- the lower one with longer wire(post cat)

Both plug and play.

Or

DOX 0109... Does all but you need to cut off and join on the existing sensor plug from the old sensor.

I have a question - having read a bit today it appears there are only 2 types of O2 sensor available and then the various number of wires - MR2 has 4 I believe as does my other car - a Subaru Legacy.
The MR2 needs a sensor and I have 2 spares for my Legacy - now what are the chances??

cheers
Steve

I followed several recommendations I read on this forum after I brought a OBD reader when having a engine warning light. The code was P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) and I decoded this again from information published on this forum. I have read many peoples comments and followed many threads on this subject and I have spent many hours repairing my cars over the past 40 years and always hear " you get what you pay for" and so ordered a Denso DOX-0204 from  w WWW.Sparkplugs.co.uk (http://www.sparkplugs.co.uk) w  £56.57 inc VAT and a socket 10.49 inc VAT this July. The service from Sparkplugs was excellent and it took me less than 10 minutes to change the sensor, it was the top right hand one looking at the rear of the car. The fault has not returned after 1000+ miles, and it would occur almost almost every journey no matter how short, I reset the code every time with my ODB reader.
I fitted the first sensor late July and drive the car almost every day making the most of this wonderful sunshine we have expereinced recently. It is now late August as I write this and in the last few journeys I have intermittently P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1). In this case I am going to try fitting the 15ohm 15watt resistor attach it to the heat shield and see if this cures the current fault code which is the top left sensor as you look at the rear of the car. SO I will update this thread when it arrives and I fit it. I hope my experience helps others.  s:D :D s:D

Quote from: "silveromriver"I followed several recommendations I read on this forum after I brought a OBD reader when having a engine warning light. The code was P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) and I decoded this again from information published on this forum. I have read many peoples comments and followed many threads on this subject and I have spent many hours repairing my cars over the past 40 years and always hear " you get what you pay for" and so ordered a Denso DOX-0204 from  m http://WWW.Sparkplugs.co.uk (http://www.sparkplugs.co.uk) m  £56.57 inc VAT and a socket 10.49 inc VAT this July. The service from Sparkplugs was excellent and it took me less than 10 minutes to change the sensor, it was the top right hand one looking at the rear of the car. The fault has not returned after 1000+ miles, and it would occur almost almost every journey no matter how short, I reset the code every time with my ODB reader.
I fitted the first sensor late July and drive the car almost every day making the most of this wonderful sunshine we have expereinced recently. It is now late August as I write this and in the last few journeys I have intermittently P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1). In this case I am going to try fitting the 15ohm 15watt resistor attach it to the heat shield and see if this cures the current fault code which is the top left sensor as you look at the rear of the car. SO I will update this thread when it arrives and I fit it. I hope my experience helps others.  s:D :D s:D

Hi and thanks for your feedback.  i am currently experiencing an issue with being richer on bank 2 than bank 1.  Something to think about, if the sensors can determine how rich/lean the car is running on each bank, that in turn is determining how efficient the combustion is on 2 cylinders (Either side).

If you remove the sensor from Bank 2 and replace with a resistor, does this mean Bank 2 could be running rough as anything and nobody would ever know?  Actually i think i just answered my own question.  Stick a resistor in and then monitor it, see how Bank 2 looks on LTFT  s:) :) s:)

I'm watching with interest as I just got the dreaded Heater Circuit Bank 2 Sensor 1 error. I have a cheapo sensor and 2 resistors in stock.

I just popped in the last of my replacement sensors so I now have a genuine Denso and 2 cheapies from Rock Auto. The first cheapy one is doing OK but I've probably only driven a few hundred miles with it.

I bought two Denso from MR2-BEN last month cost £85.00 each, plug in

My rock autos are still going strong nearly a year and a half after buying them. I had some issues because of the 2zz injectors and running rich but these have held up well!

Sent from my SM-G920F using Tapatalk

Hi, a long time updating this forum but I have done such a lot since then.
Anyway the orginal fault code where I replaced the right hand sensor has not recurred after doing about 3K miles. The left hand sensor I inserted a 15 Ohm 15 watt resistor ( very easy job pics supplied if req) also has not recurred and the car runs sweet as nut. Since the I have replaced the old pre-cat manifold with a shiny new one from Mr2 Ben and that has made a HUGE difference to the car all round better to drive. No faults anyway, so both fixes, a £2 resistor and a £56 sensor both fixed it with no effect on emissions or running as I had it tested at MOT station. Ill leave you to decide what you would do if this happens to you.

As mentioned in WHYD thread I bought a £12.97 primary sensor off eBay 3 weeks before MOT. No EML so at least the heater cct was working. Failed MOT big time on emissions.
After a thorough bollocking from my mechanic for buying a £13 sensor, I bought the Denso unit & immediately passed the MOT.

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Quote from: "cptspaulding"As mentioned in WHYD thread I bought a £12.97 primary sensor off eBay 3 weeks before MOT. No EML so at least the heater cct was working. Failed MOT big time on emissions.
After a thorough bollocking from my mechanic for buying a £13 sensor, I bought the Denso unit & immediately passed the MOT.

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I bought a £25 one and no EML either but I monitored the response from it and after a few days it just reported lean constantly, so the fuel trims were maxxed.
I guess that might fail an MOT emissions test [emoji53]

This is the £38 one btw - yes, it takes a bit of work splicing it, but it's not hard.
http://www.opieoils.co.uk/pv-135069-denso-universal-fit-lambda-sensor-dox-0109-oxygen-o2-genuine-oe-part-single.aspx

You can use that as a replacement for any of the 3.

Honestly consider hunting around for OEM (Denso/Bosch) as they're not THAT much more if you find the right source and there's infinitely less hassle as it is plug and play: screw in the one side, plug in the other, no wiring / soldering / anything else...

I saw a few generic models for ~£30-£40, but they still needed plugs to be attached: IMHO the best option would be OpieOils for the Denso DOX0204 £53.80, delivery is free if you spend more than £60 (i.e. two sensors and/or a 22mm spanner and/or 22mm sensor socket). Not sure on delivery times though as I found out about OpieOils too late!

I ended up picking up the first two from GSF (Bosch DOX0204 equivalents) that cost me £62 each for the manifold sensors and ~£57 for the post-cat one, but that was a Denso DOX0206.

Note that the only reason I went to GSF is that I was being impatient and they had a 60% Easter special.... without that, it was £155, which is only a little less than Toyota would have charged for fitting Denso's!!

None of the options I went for required ANY splicing/wiring of resistors... they were just unplug/unscrew the originals and plug/screw these into place....

77k mileage on my 53'reg 2

PO135 Bank 1 Sensor 1 just came on recently.

Toyota main stealer quoted £500 for 2 hrs labour and replacing 2 sensors.

Looking through this incredibly helpful thread going way back when, would it be prudent to replace all 3 sensors with eg Denso OEM parts at ~£180 + diy.

Are the sensors reqd.

2x DOX0204 and 1 DOX0206 ?? Thx in advance

Spot on.

If you don't mind a bit of extra work.
You can get ones without the connectors a lot cheaper. And swap them over.
As per @shnazzle recommendation.
Personally, I would rather pay.

Sparkplugs.co.uk is a good place to start.

Toyota main stealer quoted £500 for 2 hrs labour and replacing 2 sensors.

How the chuff could that be justified?

I just used a used spare one I had from my Subaru Legacy - 10 minutes work and it's been on for 2 years without fault!!

Quote from: Ardent on September 22, 2020, 12:49Toyota main stealer quoted £500 for 2 hrs labour and replacing 2 sensors.

How the chuff could that be justified?

Asking around for quotes I have managed to get £327 for all 3(Denso) supplied and fitted from an MR2 specialist :- absolutely no comparison!

Just insane these prices they're charging. And further confirms why I never ever go to a dealer unless I have no option. 

... Which is why I'm sitting in a Nissan dealership waiting for a part as I type this hahaha

Quote from: Ardent on September 22, 2020, 12:49And further confirms why I never ever go to a dealer unless I have no option.

We have an independent 1 km. down the road. Whenever I consider changing cars, fírst I ask them about whether they service it and they will honestly say if they have no experience with it. Is so, no go. A trusted garage near is like a good neighbour.

Quote from: Ardent on September 22, 2020, 12:49Toyota main stealer quoted £500 for 2 hrs labour and replacing 2 sensors.

How the chuff could that be justified?

I was quoted ~£700 for all three and they could only do it in two weeks... did it all myself and everything together (parts and tools) came in <£200... a few days later it all arrived in the post and 20mins "labour" and I was sorted, look at the thread I wrote on this for the exact parts list (this it was somethign about MOT emissions failure).

Parts breakdown was something like:

Denso/Bosch parts (2x ~£60 and 1x ~£45) - and that's the posh ones, with the plugs!
ELM327 OBD2 reader (~£5)
Torque Pro software (~£4?)
O2 socket (~£7)
22mm spanner (~£7)

Only difficult bit was the lower sensor - a quick trip to Halfords for a 22mm spanner saved me there - no WAY that was coming off with the socket!

I would just change the one that is giving the error unless you feel you have a problem. They dont like being disturbed and they can fail about the same time so the other bank may follow soon anyway (I seem to remember mine doing that). The pre cat ones are accessed from the top and mine came out fine. The post cat one is lower and is subject to more corrosion and is the hardest to get out, I had to admit defeat with my lower one and take it to a garage where they really struggled with it too. Maybe this is why they quote a lot of labour time but I doubt they drop the bill if they get it out easily! Even if you decide to take it to a garage, I would start plus gassing the sensors a few days before to make it easier for them (plus tell them you have done that so let them know you are not an idiot and lessen the chances of them ripping you off).

I would go for Densos too and if you buy the crimp on universal model, you would get all 3 for about £100 for the parts.

Co-incidentally, all my parts have arrived today to swop mine over. The densos come with the crimps etc but I had to buy the bits for mine. I hope to get shrink wrap over each crimp and then over the top of all four.

(https://i.imgur.com/iRyBGZ9.jpg)

Nine years ago whenI first got my 2 I removed the precats, when I put it all back together I got a fault light, it was the top nearside sensor. I asked a mechanic relation what to do. His advice was that I only need replace the faulty one, they are not like spark plugs and to only buy branded sensors, he typically used Bosch, but others are fine, just not eBay specials.
I replaced the one with an NGK. Around two years later the rearmost nearside one failed, again replaced with NGK. So I have one Denso OE, came with the car, and two NGK. So far no problems running problem passing MOT.

Quote from: Gibla on September 22, 2020, 13:30

Quote from: Ardent on September 22, 2020, 12:49Toyota main stealer quoted £500 for 2 hrs labour and replacing 2 sensors.

How the chuff could that be justified?

Asking around for quotes I have managed to get £327 for all 3(Denso) supplied and fitted from an MR2 specialist :- absolutely no comparison!

Apologies if I'm reading too much into it. And the specailst is just for cost reference purposes.
But you don't need a specailst for this job.

Quote from: Petrus on September 22, 2020, 14:01

Quote from: Ardent on September 22, 2020, 12:49And further confirms why I never ever go to a dealer unless I have no option.

We have an independent 1 km. down the road. Whenever I consider changing cars, fírst I ask them about whether they service it and they will honestly say if they have no experience with it. Is so, no go. A trusted garage near is like a good neighbour.

That's a bit odd.
Quote showing as me. But comment from @shnazzle post 137.

Quote from: Ardent on September 22, 2020, 18:56

Quote from: Petrus on September 22, 2020, 14:01

Quote from: Ardent on September 22, 2020, 12:49And further confirms why I never ever go to a dealer unless I have no option.

We have an independent 1 km. down the road. Whenever I consider changing cars, fírst I ask them about whether they service it and they will honestly say if they have no experience with it. Is so, no go. A trusted garage near is like a good neighbour.

That's a bit odd.
Quote showing as me. But comment from @shnazzle post 137.

You must be mistaken Jason, computers never get it wrong, error is always with the operator!

 ;D

Quote from: Ardent on September 22, 2020, 18:17But you don't need a specailst for this job.

I mean I did it... and everybody says I'm "special"....

Here's the link to my first ever ROC write up and DIY work on my MR2....

Summary:

Quote from: BahnStormer on April  5, 2018, 11:39"Bank 1/2 Sensor1" (top of manifold) - unclip the leads, unscrew the sensor and replace and plug in the new lead.
"Bank1 Sensor2" (post cat) - same process, but more wiring, so trace the wire from near the exhaust up to the plug near the LHS tail light and unplug, free up the wire and then it's exactly the same, albeit more awkward.
Difficult level 2/10 for "Bank 1/2 Sensor1" (top of manifold) and 2.5/10 for "Bank1 Sensor2" (post cat). You'll get a little dirty, but it's not complicated / dangerous / risky. The only difficult bit is if the sensors have become seized.

I bought my car with 26000 miles on, the light came on at about 45000, I replaced the top left sensor, at about 59000 I decided to de cat the manifold and after that I have had the top right one fault,I replaced it and the light went out.

**after 2 warm up / cool down cycles of the engine if there are no issues the light will go out**

And then the light came on again so I bought a code reader from ebay 'Creader' (it was £18.50) it reads all codes but not air bag.
YOU SHOULD BUY A CHEAP CODE READER !!! it is an essential tool for under £20.

My code reader said the rear one was faulty so I cleared the code and it came back in a day, I replaced the rear sensor and since then it has been 'ok' the light comes on but goes out again, I notice it about once a month, I very seldom have to clear it myself, it just goes out on its own. But the code reader is good for if it gets to MOT time and the light is on I can clear it myself and not get charged £30 on top of the MOT.

I put the number of sensors I have replaced down to milage and possibly engine bay temp because when I worked at Toyota 1994-1999 I never replaced an O2 sensor. (they never broke).

I put my light coming on erraticly now due to removing the front cat and it disrupting the gasss escaping (when you de cat and look into the exhaust manifold the pipework when de-catted does not look good for efficient gas extraction), Its not an issue, because I have the code reader and i am saving up for a ZERO manifold because I can't afford a Pro spirit one, and to be honest the zero looks better.

If you have Android, then an ELM327 for £7 + Torque Pro (was £3, now £4.50)...

Zero manifolds are great, but I gave up waiting to sav enough and got a Toyosport - I only paid £90 for mine incl delivery direct from Toyosport this time last year... plus another £40 (I think!) on accessories like proper gaskets, studs and nuts... plus some heatwrap. 

Quote from: BahnStormer on November 16, 2020, 15:13If you have Android, then an ELM327 for £7 + Torque Pro (was £3, now £4.50)...

Zero manifolds are great, but I gave up waiting to sav enough and got a Toyosport - I only paid £90 for mine incl delivery direct from Toyosport this time last year... plus another £40 (I think!) on accessories like proper gaskets, studs and nuts... plus some heatwrap. 

Hi, with your Toyosport manifold the join between the manifold and CAT pipe does it have a flat gasket instead of the two crush gaskets ? If it does did you have any sealing issues ?

Quote from: Bad Dog on December  4, 2020, 13:53

Quote from: BahnStormer on November 16, 2020, 15:13If you have Android, then an ELM327 for £7 + Torque Pro (was £3, now £4.50)...

Zero manifolds are great, but I gave up waiting to sav enough and got a Toyosport - I only paid £90 for mine incl delivery direct from Toyosport this time last year... plus another £40 (I think!) on accessories like proper gaskets, studs and nuts... plus some heatwrap. 

Hi, with your Toyosport manifold the join between the manifold and CAT pipe does it have a flat gasket instead of the two crush gaskets ? If it does did you have any sealing issues ?

I'll be honest - I can't jack my car up anywhere near my house, so I got Pat Chambers to fit mine - I supplied him with two crush gaskets and he didn't mention any problems. Ask me in Jan when I get it MOT'd :)

I thought I took a lot of photo's of it, but can't see any straight on at that face - I thought it had a slight tapering into the two pipes, but I don't recall a specific groove on that face and from memory I can't recall if the crush gaskets would have been almost the width of the pipe or much wider (i.e. needing a groove.