Genuine OEM Audi Coolant Pipe, part number 03L121065H. This essential component is responsible for circulating coolant throughout the engine cooling system, ensuring efficient heat transfer and preventing engine overheating. It is a rigid, shaped plastic pipe, weighing 0.317 kg. Using a genuine OEM coolant pipe guarantees precise routing, correct material resistance to heat and chemicals, and leak-free connections, which are critical for the longevity and reliability of the cooling system.