Genuine OEM Volkswagen Coolant Hose, part number 5QF122101AH. This precisely shaped hose is a critical component of the engine cooling system, responsible for transporting coolant between various engine components to regulate operating temperature. Its specific bends and connections ensure correct routing and fitment within the engine bay. Using a genuine OEM hose guarantees the correct material composition for resistance to heat and coolant chemicals, as well as precise dimensions and pressure ratings for reliable, leak-free performance under demanding engine conditions.