Genuine OEM Volkswagen A/C Expansion Valve, part number 1EA816682A. This critical component in the air conditioning system is responsible for regulating the flow of refrigerant into the evaporator, where it changes from a high-pressure liquid to a low-pressure gas, absorbing heat. It ensures optimal cooling performance and prevents evaporator freeze-up. Weighing approximately 1.06 kg, this valve is engineered for precise control and durability. Choosing a genuine OEM expansion valve guarantees correct calibration and material integrity, which are vital for efficient and long-lasting air conditioning system operation.