Genuine OEM Audi Battery Exhaust Hose, part number 8Z0915531. This flexible, corrugated hose is specifically designed to safely vent corrosive and potentially explosive gases produced by the battery to the outside of the vehicle. It is crucial for maintaining battery longevity and ensuring passenger safety. Weighing 0.004 kg and measuring 0.385m in length, this hose provides the exact routing and chemical resistance required for effective gas dispersion.