Genuine OEM BMW Crankcase Ventilation Vent Pipe, part number 11617547185. This vent pipe is designed to route crankcase gases to the intake system for ventilation, which helps to prevent pressure buildup and remove harmful contaminants from the engine. It is a crucial part of the emissions control system. Made from durable rubber to withstand engine bay temperatures and conditions. Genuine OEM parts ensure correct flow characteristics and a secure fit, vital for effective crankcase ventilation and emissions compliance.