Genuine OEM Audi Fuel Return Line, part number 8K0201533E. This critical component is responsible for safely routing excess fuel from the engine's fuel rail back to the fuel tank, ensuring proper fuel system pressure regulation and preventing fuel starvation or over-pressurization. It is positioned as part of the underbody fuel line assembly, connecting to the fuel tank. Genuine OEM fuel lines are manufactured to exact material specifications and routing geometry, ensuring leak-free operation and resistance to fuel and environmental degradation over time.