Genuine OEM Audi Fuel Return Line, part number 03L130235K. This component is part of the fuel system, designed to return unused or excess fuel from the engine back to the fuel tank. It helps maintain proper fuel pressure within the system and prevents fuel from overheating. Weighing 0.086 kg and measuring 0.42m x 0.04m x 0.031m, this line is constructed to resist fuel corrosion and pressure. Using a genuine OEM fuel return line ensures correct routing, material compatibility, and leak-free operation, vital for fuel system safety and efficiency.