Genuine OEM Audi Engine Inlet System Vacuum Hose, part number 7L8133778G. This hose is designed to convey vacuum within the engine inlet system, playing a critical role in various engine control functions. It is a lightweight component, weighing approximately 0.071 kg and measuring 0.45 meters in length. Using a genuine OEM vacuum hose ensures precise fitment, correct material composition for resistance to engine bay conditions, and reliable vacuum integrity, which is vital for consistent engine performance and emissions control.