View ALL BMW 635 Parts
If your BMW 635 Air Flow Meter keeps failing the issue is most likely to much oil on a BMW performance air filter, or to much blow by from the 635 engine.
Use only BMW OE quality replacement Catalytic Converters to keek your BMW 635 in the best running condition. DriveWire sells only California legal 635 OBD-II Converters.
Do not buy the cheap no name remanufactured or rebuilt BMW 635 electronic control units, as in our experience most of these ecu’s don’t even work right out of the box. We also carry programmable BMW 635 control units from AEM that allows you to custom program your BMW 635 ignition and fuel system.
The BMW 635 Oxygen sensor is a critical part of the emmision control system and should be replaced as soon as it fails. Make sure to check the BMW 635 diagnosics codes for proper replacement of the O2 Sensor.