Genuine OEM Audi Engine Coolant Hose, part number 4F0819376. This hose is responsible for carrying coolant within the engine cooling system, playing a vital role in regulating engine temperature. It is a flexible rubber hose, approximately 0.195 meters long and weighing 0.08 kg. Using a genuine OEM hose ensures the correct material composition and precise dimensions for a leak-free seal and optimal coolant flow, which is essential for preventing engine overheating and maintaining long-term reliability.