Genuine OEM Volkswagen Expansion Valve, part number 7N0816679. This valve plays a critical role in the air conditioning system by regulating the flow of refrigerant into the evaporator, thereby controlling the cooling process. It is located within the A/C system. The precise calibration and construction of this valve are essential for maintaining the correct temperature and pressure within the system. Genuine OEM parts ensure the correct refrigerant flow and system efficiency.