Genuine OEM Volkswagen Coolant Hose, part number 057121086M. This hose is an integral part of the engine's cooling system, responsible for circulating coolant between the engine and the radiator to maintain optimal operating temperature. It is located in the engine bay, connecting various cooling system components. Constructed from high-quality, heat-resistant rubber, it is designed to withstand the high temperatures and pressures within the cooling system. Genuine OEM coolant hoses ensure precise fitment and reliable performance, preventing leaks and premature failure.