Genuine OEM Audi Engine Coolant Hose, part number 4K1819371L. This hose is an essential component within the vehicle's cooling system, responsible for circulating coolant to maintain proper engine operating temperatures. It is a small, bent hose connecting to a valve assembly. Weighing 0.033 kg and measuring 0.1m in length, this hose is manufactured to exact factory specifications. Opting for a genuine OEM hose guarantees correct routing, material composition, and resistance to thermal cycling, crucial for preventing leaks and ensuring long-term cooling system reliability.