If your BMW 535 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 535 engine.
Use only BMW OE quality replacement Catalytic Converters to keek your BMW 535 in the best running condition. DriveWire sells only California legal 535 OBD-II Converters.
Do not buy the cheap no name remanufactured or rebuilt BMW 535 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 535 control units from AEM that allows you to custom program your BMW 535 ignition and fuel system.
The BMW 535 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 535 diagnosics codes for proper replacement of the O2 Sensor.