Check engine light came on. Dealer says I need a new catalytic converter (driver side) for about $1000 parts + $300 labor. He thinks O2 sensors are ok.
The car has about 120,000 miles and the O2 sensors were never changed.
Various websites suggest that a failed upstream sensor will mess up the cat, so replace the sensors if you need to replace the cat, they suggest.
So, looking at various oxygen sensor sellers, I see items labeled front, rear, back, upstream, downstream, and left and right.
The dealer told me I have sensors before and after the cat, but what's up with left and right? Do I have 4 sensors? Are there 2 for each of the
two cats? Are they really made differently for left and right?
I want to replace all 4, and also replace the failed cat, which is on the driver side. Can anyone tell me where the sensors are located and
how to I identify the type I need with respect to left and right, front and back, etc.
I was thinking of Bosch sensors. Any suggestions on where to buy the cat? I've seen prices around $200.
I'd love a link to a factory repair guide. Any ideas on that?
Thanks!
