Genuine OEM BMW Engine Crankcase Breather Hose, part number 11157532628. This hose is essential for routing crankcase gases back into the intake system for proper engine ventilation and emissions management. It is constructed from high-grade, oil-resistant rubber to withstand extreme engine bay temperatures. Genuine OEM hoses are engineered with the correct routing geometry and quick-connect fittings to prevent vacuum leaks and ensure a reliable, long-lasting seal.