Genuine OEM Audi Radiator Coolant Upper Hose, part number 8R0121101C. This hose is a vital part of the engine cooling system, responsible for carrying hot coolant from the engine to the radiator for heat dissipation. It is positioned as the upper connection between the engine and radiator. Made from reinforced rubber, it measures approximately 0.22m in length. Choosing a genuine OEM hose ensures correct routing geometry and resistance to high temperatures and pressures.