Genuine OEM Audi Upper Radiator Coolant Hose, part number 7L8122101D. This hose is crucial for the engine cooling system, transporting hot coolant from the engine to the radiator. It is positioned as the upper connection to the radiator. Made from durable rubber, it measures approximately 0.27m in length. Choosing a genuine OEM hose ensures correct routing geometry, material resistance to heat and pressure, and a leak-free connection for optimal cooling system integrity.