Genuine OEM Audi Engine Coolant Hose, part number 079121063G. This hose is an essential part of the engine cooling system, responsible for circulating coolant between various engine components, such as the radiator, water pump, and engine block. Its function is to facilitate heat transfer, maintaining the engine at its optimal operating temperature. This L-shaped hose is made from durable EPDM/PEROX rubber, designed to withstand high temperatures and pressures. Using a genuine OEM coolant hose ensures the correct material composition, precise shape, and routing, critical for preventing leaks and maintaining the integrity of the cooling system.