Genuine OEM Audi Engine Crankcase Ventilation Line, part number 059103209R. This essential component is part of the engine's positive crankcase ventilation (PCV) system, managing and redirecting crankcase gases to maintain optimal engine pressure and reduce emissions. It connects directly to the engine assembly. Weighing 0.072 kg, this line is constructed to withstand engine heat and oil vapor. Choosing a genuine OEM ventilation line ensures correct routing geometry, material compatibility, and precise connections, which are vital for maintaining engine health and emission system integrity.