Genuine OEM Audi Ventilation Hose, part number 079103209AP. This hose is part of the engine system, likely used for crankcase ventilation (PCV) or emissions control. It connects various engine components to manage internal pressures and vapors. Manufactured from high-quality, heat-resistant materials for long-term durability. Genuine OEM parts are vital for engine ventilation systems to ensure proper pressure regulation, prevent oil leaks, and maintain efficient combustion.