Genuine OEM Audi Coolant Water Hose, part number 1K0121157AG. This hose is designed to transport coolant efficiently within the engine's cooling system, connecting components like the radiator and engine block. It is positioned to accommodate engine movement and temperature fluctuations. This black, flexible hose measures approximately 0.28 meters in length. Genuine OEM hoses offer superior resistance to heat, pressure, and coolant chemicals, ensuring long-term leak-free performance and correct routing.