Genuine OEM Audi Coolant Pipe, part number 4H0121070A. This component is integral to the engine cooling system, facilitating the flow of coolant to and from the radiator and other engine components to regulate operating temperature. It is positioned as a key connection point within the cooling circuit. With a weight of approximately 0.24 kg and a length of 0.432 meters, it is engineered for precise fitment. Using a genuine OEM coolant pipe guarantees the correct material composition, resistance to thermal cycling and pressure, and accurate routing, which are essential for preventing leaks and ensuring the longevity of the cooling system.