Genuine OEM Volkswagen Coolant Hose With Coupling, part number 5N0122101H. This hose is an essential component of the engine cooling system, responsible for transporting coolant between various engine parts and the radiator. It features an integrated coupling for a secure and leak-free connection. Weighing 0.33 kg and measuring 0.405 m in length, this hose is designed to withstand high temperatures and pressures. Using a genuine OEM hose guarantees the correct material composition, internal diameter, and coupling design, which are crucial for maintaining optimal engine temperature and preventing coolant leaks.