Noob question about oxygen sensor

[express_wagon]

Sorry for the noob question but I tried a few searches. I guess I didn't come up with the right words because I am sure this has been answered before.

How many oxygen sensors do I have? It's a 1990 325is, thanks.

Jason

[O 16581 72452 5]

Take a look up under the car at the exhaust. ;)

There's one, just out of curiousity, why do you want to know?

[express_wagon]

Thanks. After doing some research on a problem, it's very likely that is the culprit (idling issue). I wanted to make sure there is only one. I know newer cars have multiple ones.

[O 16581 72452 5]

If it's an up and down idle, it's likely your ICV, search around about cleaning it, you can also by-pass it. I just simply unhooked mine, cold start sucks because i have to keep it running with the pedal, but it runs pretty smooth when it's starting to warm up. Check your spark plugs, if you have platinum plugs in there, switch to copper core.

[tonytony]

the o2 on an m20 is just after the exhaust manifolds

[NC325iC]

If it's an up and down idle, it's likely your ICV, search around about cleaning it, you can also by-pass it. I just simply unhooked mine, cold start sucks because i have to keep it running with the pedal, but it runs pretty smooth when it's starting to warm up. Check your spark plugs, if you have platinum plugs in there, switch to copper core.

that sounds smart...

[O 16581 72452 5]

that sounds smart...

Was that sarcasm?

If so, what do you disagree with?