Genuine OEM Volkswagen Air Mass Meter, part number 038906461X. This sensor measures the amount of air entering the engine, providing crucial data to the engine control unit for optimal fuel injection and air-fuel mixture. It is located in the intake system before the throttle body. This part is essential for proper engine performance, fuel efficiency, and emissions control. Genuine OEM parts are manufactured to exact specifications, ensuring precise calibration and reliable operation for the life of the component.