Genuine OEM Volkswagen Coolant Hose Assembly, part number 5QF121049F. This complex hose assembly is responsible for transporting coolant between various components of the engine cooling system, such as the radiator and engine block, to regulate engine temperature. It is located within the engine cooling system, connecting to the radiator. Weighing approximately 0.994 kg, this hose ensures efficient heat transfer. Choosing a genuine OEM coolant hose guarantees the correct material composition, routing geometry, and pressure resistance for leak-free and reliable cooling.