Genuine OEM Volkswagen Coolant Hose, part number 3D0121447R. This hose is an essential part of the engine's cooling system, designed to circulate coolant and maintain optimal engine temperature. It is part of the complex network of hoses that connect the engine, radiator, and other cooling components. The hose has dimensions of 0.2 meters in length, 0.06 meters in width, and 0.034 meters in height. Using genuine OEM hoses ensures they meet the exact material and dimensional requirements for safe and efficient operation of the cooling system.