Originally Posted by Osalpa

The X is running perfectly fine but the 4 lights are on I have 2 codes on my OBDII (P0120 & P0221), I replaced the gas pedal thinking that was the problem but no luck After that I decided to go with an independent mechanic, unfortunately, in my town, there arent many mechanics that work on BMW cars, he was trying for two days to find what the problem was, he replaced the throttle body (not oem) and MAF and nothing change good thing he charge me only for 3 hours of labor and no parts were replaced, after that he said the next step is to replace the ECM. I denied to go on that route and took the car to the dealer, they called me this morning to let me know the diagnostic and it was faulty throttle body. I agreed to do the repair they have to order the oem part. I am afraid to hear that is not the problem after they install the new throttle body. Any experience with this guys or ideas? Thanks everybody!