Genuine OEM Audi Fuel Tank Vent Line, part number 4G0201997AC. This line is a component of the evaporative emissions (EVAP) system, designed to safely manage fuel vapors from the fuel tank. It connects directly to the fuel tank assembly, routing vapors to other EVAP system components like the charcoal canister. This lightweight hose measures approximately 0.265 meters in length and weighs 0.066 kg. Choosing a genuine OEM vent line ensures correct routing, proper sealing, and material resistance to fuel vapors, which is crucial for emissions compliance and preventing fuel system leaks.