Genuine OEM Volkswagen Coolant Hose with Heater Valve, part number 7P0121156B. This hose assembly connects various engine cooling system components and incorporates a heater control valve to regulate cabin temperature. It is positioned within the engine cooling system. Constructed from high-quality rubber and plastic materials, it is designed for durability and resistance to heat and coolant. Genuine OEM parts are manufactured to exact specifications, ensuring proper flow and valve operation for reliable thermal management.