Genuine OEM Audi Engine Coolant Hose, part number 8J0121051M. This flexible hose is a vital component in the engine cooling system, responsible for transferring coolant to maintain optimal engine operating temperatures. It is designed with specific bends and connection points to ensure proper routing and fitment within the engine bay. Made from durable, reinforced rubber, this hose weighs approximately 0.39 kg and measures 0.73 meters in length. Choosing a genuine OEM coolant hose ensures the correct material properties, resistance to thermal cycling and pressure, and precise geometry, which are critical for preventing leaks and ensuring the long-term reliability of the cooling system.