Genuine OEM Audi Coolant Hose with Coupling, part number 4E0121055F. This hose is designed to transport engine coolant within the cooling system, ensuring optimal engine operating temperature. It features an integrated quick-release coupling for a secure and efficient connection, typically found at the lower section of the radiator. Measuring 0.265 m in length and weighing 0.27 kg, this hose is constructed from durable materials to withstand temperature and pressure fluctuations. Choosing a genuine OEM coolant hose ensures the correct material composition, pressure resistance, and precise routing geometry for leak-free and reliable cooling.