Genuine OEM Audi Coolant Hose, part number 1K0121101P. This hose is an essential component of the engine cooling system, responsible for transporting hot and cold coolant between the engine, radiator, and other cooling components. It is constructed from high-quality EPDM rubber, known for its excellent resistance to heat, ozone, and coolant chemicals. The hose features a specific bend for correct routing and fitment. Choosing a genuine OEM coolant hose ensures the correct material composition, pressure rating, and precise dimensions, preventing leaks and maintaining the efficiency of the cooling system.