Genuine OEM Audi Upper Radiator Feed Hose, part number 4E0121101BS. This essential hose is responsible for delivering hot coolant from the radiator to the engine, playing a vital role in the vehicle's heat exchange and temperature regulation system. Weighing 0.268 kg and measuring 0.28m x 0.19m x 0.08m, this genuine OEM hose is engineered for precise fitment, optimal coolant flow, and resistance to high temperatures and pressures, ensuring reliable and leak-free operation within the engine cooling system.