Genuine OEM Audi Coolant Hose with Coupling, part number 5QF121156. This precisely molded hose is a critical component of the engine cooling system, designed to transport coolant between various engine and radiator components. It features an integrated coupling for secure and quick connection and disconnection. The hose is located within the engine bay, connecting parts of the turbocharger/intercooler system to the main cooling circuit. Weighing 0.849 kg and measuring 0.54m in length, its specific routing and material composition are engineered for high temperature and pressure resistance. Using a genuine OEM hose ensures correct routing geometry, material durability, and leak-free performance under demanding engine conditions.