Genuine OEM Citroen Diesel Injector Return Pipe, part number 9831641280. This pipe is designed to return excess diesel fuel from the engine's injectors back to the fuel tank, ensuring optimal fuel system operation and pressure regulation. It is an integral part of the fuel delivery and return circuit. Using a genuine OEM return pipe guarantees the correct material composition, precise routing geometry, and resistance to fuel and engine bay conditions, preventing leaks and maintaining system integrity.