Genuine OEM Volkswagen Coolant Hose, part number 5C0121447. This hose is a critical component in the engine's cooling system, responsible for transporting coolant between various engine parts to maintain optimal operating temperature. It is specifically located at position 19 within the cooling system assembly. Constructed from high-quality, heat-resistant rubber, it is designed to withstand the pressures and temperatures of the coolant flow. Genuine OEM hoses are engineered for precise fitment and durability, ensuring leak-free operation and consistent engine cooling.