[joepa150]

I have a Service engine soon light. I took my car to Oreillys and the code was Code was P112D.
I also took it to a BMW service shop. They said that at 52k, it probably isn't the oxygen sensor but that is what the code was saying. They gave me a price of almost $400 to replace.
I called another BMW service shop and they said it probably isn't the sensor because of the mileage.
I called BMW and they wanted $120 to look at it.

Should I just replace it myself?
How much does that sensor usually run (and who sells them)?

I always thought the warranty was something like 4yrs/50k.
Is the sensor somehow still covered?

[Efthreeoh]

Check your emissions warranty. It could be covered up to 80,000 miles. A P1XX code is a special manufacturer code, but the source I checked had no P112D code for BMW. Get the car properly scanned with a BMW scan tool.