Audi-Loyal

Does anybody know when the oxygen sensor needs to be replaced in a 95 Audi A6? I just hit 60k and I thought it needed replacement, but I couldn't find it in my maintenance schedule. Do I still need to replace it?

Style12v

60k is the recomended time

muhammadc

Or 100k on OBD II sensors ('96 and newer)

Mike NH

The service manager at the Audi dealer in Gilford, NH told me not to bother until they failed. I didn't change my first one until 90k. Still have the other three originals. They cost too much to worry about ahead of time, IMHO. And it didn't seem to cause any catastrophy when it finally did fail. The "Check Engine" light came on. But I tend to be lazy, so take that FWIW.

muhammadc

Until your cats are plugged. I, too, won't be replacing mine until they fail.

cosmosx

When they fail, the light comes on, you replace them. It would take quite a bit of driving with a check engine light on for a failed sensor to plug a cat.

mblake

Have MIL on now. Local garage did a scan for me and tells me the code is 23xx (can't rememeber last two digits). 96 A6 w/ 70K. How can you tell which of the four O2 sensors have failed?

Mtnboy7

Anyone know how to replace the oxygen Sensor in an 1992 100? My check engine light is on and i think this is the issue.? ! Thanks
Dave