Genuine OEM Audi crankcase ventilation hose, part number 079103209CE. This hose is a crucial component of the engine's crankcase ventilation system, designed to safely vent blow-by gases and maintain proper crankcase pressure. It connects various parts of the ventilation system within the engine assembly. Made from high-quality, durable materials to withstand engine conditions. Genuine OEM parts ensure the correct flow characteristics and material integrity required for effective emissions control and engine longevity.