Genuine OEM Volkswagen Coolant Hose, part number 3QF121070J. This hose is an essential part of the engine cooling system, designed to transport coolant between different components. It is marked as number 15 in the diagram. The part weighs 0.268 kg and has dimensions of 0.38m x 0.1m x 0.085m. Genuine OEM coolant hoses are constructed from materials that resist heat, pressure, and degradation, ensuring reliable fluid transfer.