Genuine OEM Audi ventilation hose, part number 4F0201994BJ. This ventilation hose is part of the vehicle's fuel system, likely involved in the evaporative emissions control (EVAP) system, managing fuel vapors. It is constructed from durable materials designed to resist fuel and environmental exposure. Proper functioning of this hose is crucial for efficient fuel vapor management and compliance with emissions standards. Genuine OEM parts guarantee exact specifications for reliable performance.