11151404980 Genuine OEM BMW Crankcase Ventilation Oil Separator Hose, part number 111404980. This hose is a critical component responsible for transporting gases within the crankcase ventilation system. It ensures proper functioning of the engine by managing internal pressures and emissions. Manufactured to exact specifications for a precise fit and reliable performance. Genuine OEM parts are engineered with specific material properties and tolerances to ensure optimal function and longevity in the demanding engine environment.