Genuine OEM Audi Vacuum Pipe with Non-Return Valve, part number 07L133781D. This component manages vacuum pressure and flow within the engine's intake system, crucial for the operation of various vacuum-actuated components. It includes an integrated non-return valve to control flow direction. The assembly measures approximately 0.44 meters in length. Choosing a genuine OEM vacuum pipe ensures correct routing geometry, material integrity, and precise valve function for reliable engine performance and emissions control.