Genuine OEM Volkswagen Air Conditioning Expansion Valve, part number 2Q0816679A. This valve precisely regulates the flow of refrigerant into the evaporator, controlling the cooling process within the air conditioning system. It is typically located at the inlet of the evaporator, within the HVAC assembly. Weighing 0.16 kg, this valve is engineered for accurate refrigerant metering. Using a genuine OEM expansion valve ensures correct calibration and material compatibility, vital for maintaining efficient cooling performance and preventing costly AC system failures.