Genuine OEM Audi Activated Charcoal Container Air Line, part number 4N0131959F. This line is an integral component of the evaporative emissions system, responsible for transporting air and fuel vapors to and from the activated charcoal canister. It is positioned within the emissions system, connecting to the charcoal container. Constructed from durable, fuel-resistant materials, it weighs 0.062 kg and measures approximately 0.39m in length. Using a genuine OEM air line ensures correct routing, sealing, and material compatibility, preventing leaks and maintaining the efficiency of the emissions control system.