Genuine OEM Volkswagen Coolant Hose, part number 3QF121063. This coolant hose is a vital part of the engine's cooling system, responsible for transporting coolant between engine components and the radiator. It is designed to withstand high temperatures and pressures. Made from durable, heat-resistant rubber. Genuine OEM coolant hoses are manufactured to precise specifications to prevent leaks and ensure optimal cooling system performance.