Genuine OEM Audi Engine Coolant Hose, part number 8W1122051. This hose is an essential component of the engine cooling system, responsible for circulating coolant. It connects to the expansion tank, facilitating the flow of coolant to maintain optimal engine operating temperatures. Weighing approximately 0.059 kg and measuring 0.16 m in length, this hose is designed for precise routing and secure connections. Using a genuine OEM coolant hose ensures the correct material properties for resistance to heat and pressure, preventing leaks and maintaining the efficiency of the cooling system.