Genuine OEM BMW Engine Vent Hose, part number 11158693006. This hose is a critical component of the engine's crankcase ventilation system, designed to safely route blow-by gases away from the crankcase and back into the intake system for re-combustion. Proper functioning of this hose is essential for reducing emissions and preventing oil contamination. It connects various parts of the ventilation system. Made from durable, oil-resistant materials. Genuine OEM parts are manufactured to precise specifications for reliable performance and longevity.