Genuine OEM Volkswagen Return Line, part number 04B145735C. This component is a fluid line, likely for oil or coolant, that connects to the turbocharger assembly. It facilitates the return of fluid from the turbocharger back to the engine's lubrication or cooling system, ensuring proper operation and preventing overheating. The precise routing and material are critical for durability and leak-free performance. Genuine OEM parts ensure correct flow rates and resistance to heat and pressure.