Genuine OEM Volkswagen Water Radiator Hose, part number 1S0121051. This hose is a vital component of the engine cooling system, responsible for transporting hot coolant from the engine to the radiator and cooled fluid back to the engine. Its durable construction is designed to withstand high temperatures and pressures, as well as resist degradation from coolant chemicals. Weighing 0.493 kg, this hose features precise bends for optimal routing. Choosing a genuine OEM radiator hose ensures the correct material composition, internal diameter, and flexibility, crucial for preventing leaks and maintaining efficient engine cooling.