Genuine OEM Volkswagen Mass Air Flow Sensor, part number 038906461C. This sensor is a vital component of the engine management system, precisely measuring the mass of air entering the engine's intake. This data is then used by the engine control unit (ECU) to calculate the correct amount of fuel to inject and to determine optimal ignition timing. It is typically located in the air intake tract between the air filter and the throttle body. Weighing 0.343 kg, this sensor is constructed from durable plastic with sensitive internal elements. Choosing a genuine OEM sensor ensures accurate calibration and signal characteristics, which are critical for maintaining engine efficiency, power output, and emissions compliance.