Genuine OEM Volkswagen Water Cooler Hose, part number 12E122101A. This hose is responsible for circulating coolant between the engine and the radiator, facilitating the removal of excess heat. It is positioned on the left side of the cooling system, connecting directly to the radiator. Weighing 0.482 kg and measuring 0.53 meters in length, this hose is designed for specific pressure and temperature conditions. Choosing a genuine OEM water cooler hose ensures the correct material composition for heat and pressure resistance, precise routing, and secure connections, preventing leaks and maintaining the integrity of the cooling system.