Bosch Mass Air Flow Sensor (MAF) for Mk4 BEW and Mk5 BRM

What It Is
A genuine Bosch mass air flow sensor (Bosch part 0281002531) for the Mk4 BEW and Mk5 BRM engines.

Why This Matters
The MAF sensor tells the ECU how much air is entering the engine, which the ECU uses to calculate the correct fuel delivery. A failing MAF sensor commonly shows up as reduced fuel economy, a noticeable loss of power, or the car dropping into limp mode, where power is cut until the car is restarted.

Fitment

• 2004-2006 Mk4 New Beetle, Golf, and Jetta Wagon TDI, BEW engine
• 2004-2005.5 Mk4 Jetta TDI, BEW engine
• 2005.5-2006 Mk5 Jetta TDI, BRM engine

Common Questions

How do I know if my MAF sensor is failing?
Common symptoms include lower fuel economy, a loss of power, or the car going into limp mode, where it loses power until you restart it.

Is this a genuine Bosch part or aftermarket?
Genuine Bosch, part number 0281002531.

Does this fit the ALH engine?
No, this sensor is specific to BEW and BRM engines. ALH-engine cars use a different MAF sensor part number.