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I just bought this 2007 M coupe with 40k miles about 2 weeks ago and so far I LOVE IT! TN requires an emissions test to get tags. Took it in to the emissions station and passed no problem. About 3 or 4 days later (not exactly sure on the time frame) my Service engine soon light came on.
P2197, P2415, P2629 were the codes it was throwing. O2 sensor Bank 2 Sensor 1.
Could an emissions test have possibly caused an O2 sensor to fail? It just seems crazy that the car could pass emissions but then not even a week later the code was throwing.
Also trying to find the part on bavauto is a little confusing to me. I typed in the part Oxygen Sensor and came up with these two part numbers.
1)11 78 1 406 621 is $150.95 for cyl 1-3 which is bank 1 correct?
2)11 78 1 406 622 is $100.95 which is the one I believe i need cause it says for cyl 4-6
Just making sure i'm not buying the wrong part. How much of a pain is it to DIY? Thanks
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