Genuine OEM Audi Coolant Pipe, part number 03L122157Q. This rigid pipe is an integral part of the engine cooling system, responsible for transporting coolant between various engine components and the radiator. It features specific routing geometry and connection points, including hose connections and an integrated valve or sensor housing. Weighing 0.851 kg, it ensures efficient heat transfer. Choosing a genuine OEM coolant pipe guarantees precise fitment, resistance to temperature and pressure, and correct routing, which is essential for preventing leaks and maintaining engine cooling efficiency.