Genuine OEM Volkswagen Return Line, part number 03L130235AD. This return line is a vital component of the fuel system, designed to safely channel excess fuel from the injection system back to the fuel tank. Its specific routing and material construction prevent leaks and ensure proper fuel pressure regulation. As a genuine OEM part, it guarantees precise fitment and durability, maintaining the integrity of the fuel system. OEM return lines are built to withstand fuel pressure and chemical exposure.