Quote:
Originally Posted by S_CDSM5
I agree with you. I thought it was weird the post o2 sensor was even going bad. Maybe pre but not post...maybe a bad catalytic converter? Wouldn’t think any of this would be happening at 66k. I had the car at one bmw dealership last week that said post o2 sensor and I just dropped the car off at another nearby bmw dealer to get a second opinion. If they say the same then I’ll replace the post o2 sensor and see. At this point I’m tired of dealing with this cars faults and issues and may trade it in on something simple like a 2020 M240 or something.
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Did replacing o2s ever solve your issue? I seem to be having the same problem with similar mileage. 68k throwing just the P0171 code