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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.
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.
If your BMW 540 Fuel Injector has failed, be sure to replace the fuel injectors in complete sets. We have some of the the best prices on Bosch BMW 540 Fuel Injectors with free shipping.
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.