Genuine OEM Audi Engine Coolant Hose, part number 9J1121637. This hose is crucial for transporting coolant within the engine cooling system, maintaining optimal engine operating temperatures. It is positioned within the complex coolant circuit, connecting various components. Measuring 80mm long, 70mm wide, and 45mm high, it is designed for a precise fit. Using a genuine OEM coolant hose ensures it can withstand high temperatures and pressures, preventing leaks and maintaining cooling system integrity.