Genuine OEM Volkswagen Coolant Hose, part number 2K0122109. This flexible hose is an essential component of the engine cooling system, responsible for transporting coolant between various parts, including the expansion tank and other engine components. Its specific routing and durable construction are designed to withstand engine heat and pressure. With a length of approximately 0.5 meters, it provides a precise connection. Choosing a genuine OEM coolant hose ensures exact fitment, resistance to thermal cycling and chemical degradation, and reliable performance, preventing leaks and maintaining optimal engine operating temperatures.