Genuine OEM Volkswagen Air Conditioner Expansion Valve, part number 7P0820679A. This critical component precisely regulates the flow of refrigerant into the evaporator, ensuring efficient cooling and optimal air conditioning performance. It is an integral part of the vehicle's HVAC system, controlling the phase change of the refrigerant. Designed for R134a refrigerant systems, it ensures compatibility and proper operation. Choosing a genuine OEM expansion valve guarantees precise calibration and reliable refrigerant control, which is vital for efficient and long-lasting A/C system function.