Genuine OEM Audi Engine Coolant Pipe, part number 7L6815802. This pipe is a vital component of the engine cooling system, responsible for carrying coolant to and from various engine components to regulate temperature. Weighing 0.226 kg, a genuine OEM coolant pipe ensures the precise routing, durable material construction, and resistance to corrosion and pressure, which are critical for preventing leaks and maintaining the efficiency of the cooling system.