Genuine OEM Audi Coolant Hose with Coupling, part number 4M0122055BL. This hose is a vital component of the engine cooling system, responsible for circulating coolant to regulate engine temperature. It is typically located within the engine bay, connecting the radiator to other cooling system components. Constructed from durable, reinforced rubber, it measures approximately 0.465 meters in length and includes an integrated coupling for secure connection. Using a genuine OEM coolant hose ensures precise fitment, resistance to high temperatures and pressures, and prevents leaks, which are critical for maintaining engine health and preventing overheating.