Genuine OEM Volkswagen Upper Radiator Coolant Hose, part number 5C0121049M. This vital hose is responsible for transporting hot coolant from the engine to the upper inlet of the radiator, initiating the cooling process. Its specific molded shape ensures correct routing and connection within the engine bay. Weighing 0.893 kg, a genuine OEM coolant hose is manufactured from high-quality, heat-resistant rubber compounds, guaranteeing resistance to extreme temperatures and pressures, preventing leaks, and ensuring the long-term efficiency of the engine cooling system.