Genuine OEM Volkswagen Expansion Valve, part number 1EA816590B. This valve controls the flow of refrigerant into the evaporator, regulating temperature. It is a critical component in the air conditioning system, ensuring optimal cooling performance. The expansion valve is located at position 41 in the diagram. It weighs 0.285 kg. Genuine OEM manufacturing guarantees precise flow control and durability, essential for maintaining the correct cabin temperature and preventing system damage.