Genuine OEM Volkswagen Coolant Hose, part number 5QF122101DR. This hose is essential for transporting coolant between engine components, playing a critical role in regulating the engine's operating temperature. It is positioned as part 1 in the engine cooling system diagram. Constructed from durable rubber and plastic, it is designed to withstand the high temperatures and pressures of the cooling system. Genuine OEM coolant hoses ensure precise fitment and optimal flow, preventing leaks and maintaining engine health.