BMW Mass Air Flow Sensor - VDO 13627520519

Product Information

This OE VDO mass air flow (MAF) sensor precisely monitors the volume of air entering your BMW’s engine to help the DME (engine computer) calculate the correct fuel mixture. It uses a hot wire sensing element, which heats an electrically charged wire and measures how much current is needed to maintain its temperature as air flows over it. This reading ensures accurate fuel injection and optimal combustion under all driving conditions.

As the sensor wears, it can become less accurate or fail altogether, leading to poor engine performance, a check engine light, or even limp mode. A quick test involves disconnecting the sensor—if the engine runs smoother without it, replacement is likely needed.

Mass Air Flow Sensor
The MAF sensor is a vital part of your engine management system. By providing precise airflow data, it helps maintain fuel efficiency, reduce emissions, and support smooth drivability. This VDO sensor is a direct-fit OE replacement built to match BMW specifications.

Failure Symptoms:

• Check engine light: Often triggered by airflow-related fault codes (P0100–P0104).
• Rough idle or stalling: Caused by incorrect air readings affecting fuel trim.
• Fuel trim issues: Engine may run rich at idle or lean under load.
• Consistent imbalance: Poor air/fuel mixture leads to hesitation, poor mileage, or emissions issues.