Genuine OEM Volkswagen Vent Hose, part number 03C103560AA. This hose is part of the crankcase ventilation system, helping to manage emissions by routing blow-by gases back into the intake. It connects the valve cover to the intake system. The hose is made of durable, oil-resistant rubber. Genuine OEM parts ensure the correct flexibility, routing geometry, and material resistance to prevent leaks and maintain emissions control.