Genuine OEM BMW Crankcase Vent Valve, part number 11157501567. This valve plays a critical role in regulating pressure and ventilation within the engine's crankcase, helping to prevent oil leaks and improve emissions. It features a hose connection for integration into the engine's ventilation system. Manufactured to precise tolerances for optimal performance. Genuine OEM crankcase vent valves are vital for maintaining correct crankcase pressure, preventing oil contamination, and ensuring the longevity and efficiency of the engine.