View ALL BMW 540 Parts
If your BMW 540 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 540 engine.
DriveWire has a large selection of Genuine BMW 540 Air Injection Pumps at discount prices. If your BMW has failed the emissions test due to high Co or Hc, check the 540 electronic air pump.
Use only BMW OE quality replacement Catalytic Converters to keek your BMW 540 in the best running condition. DriveWire sells only California legal 540 OBD-II Converters.
Do not buy the cheap no name remanufactured or rebuilt BMW 540 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 540 control units from AEM that allows you to custom program your BMW 540 ignition and fuel system.
The BMW 540 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 540 diagnosics codes for proper replacement of the O2 Sensor.