Genuine OEM Audi Coolant Hose with Coupling, part number 4K1122109B. This hose is an integral part of the engine cooling system, responsible for transferring coolant between various engine components to regulate temperature. It includes an integrated coupling for secure connection. Measuring 0.15 meters in length and weighing 0.076 kg. Using a genuine OEM coolant hose guarantees the correct material composition for heat and pressure resistance, precise routing geometry, and reliable connections to prevent leaks and maintain cooling system efficiency.