Genuine BMW Vacuum Pipe With Non-Return Valve - 11667850595 - This genuine BMW vacuum pipe with non-return valve is designed for use in a variety of BMW models. It is an OEM (Original Equipment Manufacturer) part, meaning it is made to the same exacting standards as the part that originally came with your vehicle. This part is a direct replacement for the 11667850595 part number, so you can be sure it will fit and function as intended.