Genuine OEM Volkswagen Valve, part number 03C103175F. This valve controls the flow of gases within the engine's crankcase ventilation system, often referred to as the PCV (Positive Crankcase Ventilation) system. It is located at position 6 on the diagram. This valve weighs 0.044 kg. Genuine OEM valves are manufactured to strict tolerances to ensure proper sealing and flow control, which is crucial for engine health, emissions control, and preventing oil contamination.