Genuine OEM Volkswagen Coolant Hose, part number 1N3121449A. This hose is responsible for transporting coolant between various components of the engine's cooling system. It is identified as position 14 in the diagram. Constructed from high-quality, heat-resistant rubber to withstand the demands of the cooling system. Genuine OEM hoses are designed with specific internal diameters and wall thicknesses to ensure optimal coolant flow and prevent premature failure.