Genuine OEM Volkswagen Water Cooler Hose, part number 1S0121101. This critical hose is designed to transport coolant water within the engine's cooling system, connecting directly to the radiator. It is specifically located on the left side of the cooling assembly. Weighing 0.167 kg and measuring approximately 30 cm in length, this hose is constructed to withstand high temperatures and pressures. Opting for a genuine OEM hose ensures precise fitment, optimal routing, and resistance to degradation from coolant, preventing leaks and maintaining efficient engine cooling.