Genuine OEM Audi Lower Radiator Coolant Hose, part number 8W0122055R. This hose is specifically designed to connect to the lower part of the radiator, facilitating the flow of cooled engine coolant back into the engine. Weighing approximately 0.33 kg, it is constructed from durable, heat-resistant rubber compounds. Using a genuine OEM coolant hose ensures precise routing, correct diameter, and resistance to thermal cycling and chemical degradation, which are critical for preventing leaks and maintaining efficient engine cooling.