Genuine OEM Volkswagen Vent Hose, part number 03H103474E. This hose is part of the crankcase ventilation system, designed to manage internal engine pressures and emissions by routing blow-by gases back into the intake. It is located in the engine bay, connecting to the intake manifold assembly. Constructed from durable rubber, it withstands engine heat and oil exposure. Genuine OEM parts are manufactured to exact specifications, ensuring proper fit, material integrity, and long-term reliability.