Genuine OEM Volkswagen Coolant Hose, part number 3WA122051AB. This component transports coolant between engine components and the radiator, facilitating heat exchange and maintaining optimal engine temperature. It is positioned within the engine bay, connecting various parts of the cooling system. The hose is made of reinforced rubber for durability and resistance to heat and pressure. Genuine OEM hoses are designed with precise internal diameters and routing for proper flow and to prevent leaks.