Genuine OEM Audi Crankcase Breather Vent Hose, part number 06E103217AD. This hose routes crankcase gases for ventilation, playing a critical role in engine emissions and pressure regulation. It is approximately 0.52 meters long and weighs 0.131 kg. Using a genuine OEM hose ensures correct routing, material compatibility, and resistance to oil and heat, preventing leaks and maintaining engine efficiency.