BMW Mass Air Flow Sensor - Bosch 0280218271

Product Information

This OE Bosch mass air flow (MAF) sensor is engineered to provide precise measurements of the air entering your engine’s intake system. It uses hot film technology—a heated element that reacts to incoming airflow by adjusting current flow. This data is transmitted to the DME (engine management system) to calculate the optimal air/fuel mixture for efficient combustion, reduced emissions, and smooth engine performance.

As the sensor ages, its accuracy may decline due to dirt, oil vapor buildup, or heat-related wear. A failing MAF can lead to poor drivability, a check engine light, and even limp mode. A simple test is to unplug the sensor—if the engine runs better, replacement is likely necessary.

Mass Air Flow Sensor
Bosch’s hot film MAF sensors feature self-cleaning technology and are built to OE standards for reliability and precision. This component is essential for modern engine management, helping your BMW maintain proper fuel metering under all load conditions.

Failure Symptoms:

• Check engine light: Typically caused by MAF-related fault codes (P0100–P0104).
• Rough idle or stalling: From inconsistent airflow data affecting fuel injection.
• Fuel trim imbalance: Rich at idle or lean under load due to incorrect readings.
• Poor performance or mileage: Caused by a constantly off-ratio air/fuel mixture.