Genuine OEM Volkswagen Engine Coolant Hose, part number 03L121049H. This hose is a critical component of the engine cooling system, responsible for transporting coolant between various engine components like the radiator, engine block, and heater core. It is a pre-formed, reinforced rubber hose designed for specific routing. Weighing 0.074 kg and measuring 0.265 m in length, this hose is built to withstand high temperatures and pressures. Using a genuine OEM coolant hose ensures precise fitment, resistance to coolant chemicals, and long-term leak-free operation, vital for preventing engine overheating.