02 sensors failing

[Anonymous]

Hi All,

Just had a search and can't quite find what I'm after ..... but I'm sure someone'll prove me wrong.

I took my MR2 into MrT a few weeks back because of an engine management light on. They said it was an o2 sensor (Bank 1 Sensor 1). I paid them 250 quid (what a mug) and they kndly replaced it. After a few runs thereafter the light came on again. Just taken it back to MrT and they say that Bank 1 Sensor 2 is now dead. So I have a few questions ....

is this common?
is there an underlying fault that could cause 2 to fail at the same time?
is it ok to buy the generic 4 wire o2 sensor from gendan for this?
http://www.gendan.co.uk/product_O24WIRE.html
which sensor is Bank 1 sensor 2?
and does anyone have any tips for replacement?

If it's relevant it's a pre 03 UK car. Sorry for all the questions, thanks all!

Ian.

[aaronjb]

It's fairly common.
There probably isn't an underlying fault, just age - and/or they got the wrong code the first time...
Generic is fine (that's definitely covered in other threads)
It's the one AFTER the main cat (again, definitely in other threads)

[Anonymous]

cheers Aaron.

After switching my brain on I found some better posts to help me through this.

I've found a really useful diagram from a previous post which may help some people http://www.mr2roc.org/phpBB2/viewtopic.php?t=10854&highlight=resistor+heater