Genuine OEM Volkswagen Coolant Hose, part number 1J0122109CD. This hose is a critical part of the engine cooling system, responsible for transporting coolant between various engine components to maintain optimal operating temperatures. It is designed to withstand the high temperatures and pressures inherent in the cooling circuit. Made from robust, heat-resistant rubber, this hose ensures flexibility and integrity over its service life. Using genuine OEM coolant hoses guarantees correct routing, precise fitment, and resistance to degradation, which is essential for preventing leaks and ensuring efficient engine cooling.