Genuine OEM Volkswagen Air Mass Meter, part number 03H906461. This component measures the volume and density of air entering the engine's intake system, providing critical data for the engine control unit to calculate the correct fuel-air mixture. It is located in the intake tract, typically between the air filter housing and the throttle body. The part weighs 0.309 kg. Genuine OEM sensors are precisely calibrated to ensure accurate air flow readings, vital for optimal engine performance, fuel efficiency, and emissions control.