Genuine OEM Audi Air Conditioner Expansion Valve, part number 1EA816681A. This component is crucial for regulating the flow of refrigerant into the evaporator, which is essential for the air conditioning system to cool the cabin effectively. Weighing approximately 1.06 kg, it measures 0.105 m in length, 0.1 m in width, and 0.07 m in height. Choosing a genuine OEM expansion valve ensures correct refrigerant metering and system pressure, preventing premature compressor failure and maintaining factory-specified cooling performance.