If your Volkswagen Passat Air Flow Meter keeps failing the issue is most likely to much oil on a Volkswagen performance air filter, or to much blow by from the Passat engine.
DriveWire has a large selection of Genuine Volkswagen Passat Air Injection Pumps at discount prices. If your Volkswagen has failed the emissions test due to high Co or Hc, check the Passat electronic air pump.
Use only Volkswagen OE quality replacement Catalytic Converters to keek your Volkswagen Passat in the best running condition. DriveWire sells only California legal Passat OBD-II Converters.
If your Volkswagen Passat failed the emissions test due to high NOX, the EGR Valve is most likely the issue. If your Volkswagen is running rough or has poor fuel mileage, replace the Passat EGR Valve and gasket.
The Volkswagen Passat 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 Volkswagen Passat diagnosics codes for proper replacement of the O2 Sensor.