Genuine OEM Volkswagen Vent Hose, part number 03C103474AA. This hose is part of the engine's ventilation system, specifically designed to manage crankcase pressure and emissions by recirculating gases. It connects to the engine cover. The hose has a length of 0.335 meters. Genuine OEM vent hoses are made from durable materials that resist heat and oil, ensuring proper function and longevity within the engine bay.