Genuine OEM Audi Coolant Hose, part number 6R0122051AF. This hose is a vital part of the engine cooling system, responsible for transporting hot coolant between various engine components and the radiator. Its robust construction is designed to withstand high temperatures and pressures, ensuring efficient heat exchange and preventing engine overheating. A genuine OEM hose guarantees the correct routing geometry, material resistance to coolant chemicals, and durability, which are critical for reliable engine cooling.