Genuine OEM Volkswagen Water Radiator Coolant Hose, part number 5QF122101DF. This hose is responsible for transporting coolant between the radiator and the engine, playing a vital role in the engine's thermal management system. It is positioned on the left side of the radiator assembly. With a length of 0.46 meters and weighing 0.309 kg, this hose is designed to withstand high temperatures and pressures. Using genuine OEM coolant hoses ensures correct material composition, precise routing, and resistance to degradation from coolant chemicals, preventing leaks and maintaining cooling system efficiency.