Genuine OEM Volkswagen Breather Line, part number 03L103493. This flexible hose is part of the crankcase ventilation system, carrying blow-by gases from the crankcase to the intake manifold for re-combustion. It is located on the engine, connecting the valve cover to the intake system. Constructed from durable, oil and heat-resistant rubber, it ensures reliable operation. Genuine OEM parts are essential for emission control systems, guaranteeing correct flow rates and material integrity to prevent leaks and maintain engine health.