Compatible with E82 128I, E9X 328I, and other , meeting the requirements for engine crankcase ventilation hose installation. Corresponds to part number 11157559528; single-piece pack can be directly replaced. Fulfills the function of venting gas from the crankcase, connecting to the engine ventilation system. Helps balance crankcase pressure, ensuring stable operation of the ventilation system. Compatible with crankcase ventilation hoses, supporting the normal operation of the engine ventilation system.