Genuine OEM Volkswagen Coolant Hose, part number 7E0121073L. This essential hose transports coolant between various engine components, playing a critical role in the engine's thermal management system. It is located within the engine bay, connecting parts of the cooling circuit. Made from durable, heat-resistant rubber, it weighs approximately 0.17 kg. Using a genuine OEM hose ensures the correct routing geometry, material composition, and resistance to temperature and pressure fluctuations, preventing leaks and maintaining efficient engine cooling.