Genuine OEM Volkswagen Engine Ventilation Line, part number 03N121070K. This line is designed to facilitate proper engine crankcase ventilation, removing harmful blow-by gases and maintaining optimal pressure within the engine. It is integrated into the engine's ventilation system. This line weighs 0.145 kg. Choosing a genuine OEM ventilation line ensures the correct material resistance to oil and heat, precise routing, and secure connections, which are vital for preventing leaks, maintaining engine cleanliness, and ensuring proper emission system function.