Genuine OEM Audi Left Coolant Pipe, part number 057121597Q. This pipe is a critical component of the engine cooling system, designed to route coolant between engine components and the radiator assembly. It is specifically positioned on the left side of the vehicle's engine bay. This rigid pipe, weighing approximately 0.19 kg and measuring about 0.32 meters in length, includes a port for a sensor. Using a genuine OEM pipe guarantees precise fitment, correct material integrity, and resistance to the demanding conditions of the cooling system, preventing leaks and ensuring accurate sensor readings.