Genuine OEM Volkswagen Coolant Hose with Coupling, part number 1EA122101BN. This hose is a vital component of the engine cooling system, responsible for circulating coolant to regulate and maintain optimal engine operating temperatures. It connects to the radiator and other cooling system components, featuring an integrated coupling for a secure fit. This hose assembly weighs 0.595 kg. Choosing a genuine OEM coolant hose ensures the correct material resistance to heat and pressure, precise internal diameter for optimal flow, and reliable coupling integrity, preventing leaks and ensuring efficient engine cooling.