Genuine OEM Audi Engine Coolant Hose, part number 1K0121086AD. This critical component is part of the engine cooling system, responsible for circulating coolant between various engine components, such as the engine block, cylinder head, and radiator. It ensures the engine maintains its optimal operating temperature, preventing overheating. This multi-branched hose weighs 0.281 kg and measures 0.45m in length. Choosing a genuine OEM coolant hose guarantees the correct material composition to resist heat and coolant chemicals, precise routing, and secure connections, which are vital for preventing leaks and ensuring the long-term health of the engine.