Genuine OEM Audi Water Coolant Radiator Hose, part number 2Q0121049AK. This essential component is responsible for transporting coolant between the engine and the radiator, playing a vital role in regulating engine temperature. It is specifically designed for the right side of the engine cooling system. Constructed from durable, heat-resistant rubber, this hose assembly weighs approximately 1.16 kg. Using a genuine OEM hose ensures the correct routing geometry, material resistance to heat and pressure, and proper connection points for a leak-free and efficient cooling system.