Genuine OEM Volkswagen Coolant Hose with Coupling, part number 3Q0122051CB. This complex hose assembly is a vital part of the engine cooling system, responsible for transporting coolant between various engine components, the radiator, and the heater core to maintain optimal operating temperatures. It is positioned within the engine bay, following specific routing paths. Constructed from durable, heat-resistant rubber and plastic, this assembly weighs 0.878 kg and has a length of approximately 1.04 meters. Installing a genuine OEM coolant hose ensures precise fitment, correct material resistance to heat and pressure, and reliable, leak-free performance essential for engine longevity.