Genuine OEM Audi Engine Vacuum Hose, part number 0P2131179A. This component is essential for transmitting vacuum pressure to various engine systems, supporting functions like brake boosting, emissions control, or turbocharger regulation. It is typically found within the engine bay, connecting specific vacuum-actuated components. Constructed from durable, flexible material, it measures approximately 23.6 cm in length. Using a genuine OEM vacuum hose ensures proper sealing and resistance to degradation, maintaining critical engine performance and efficiency.