Removal & Installation (525i & 530i)

WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

Press brake pedal several times to reduce vacuum pressure in brake booster. This makes it easier to remove PA pipe.
Remove lower section of microfilter housing. See MICROFILTER HOUSING LOWER SECTION .
Detach non-return valve (1) from brake booster. See Fig 1.
Unfasten hose clip (1). See Fig 2. Detach molded hose (3) from PA tube. Withdraw molded hose (3) from fixture (2).
To install, reverse removal procedure. Replace hose clip.

Fig 1: Detaching Non-Return Valve From Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Removing Vacuum Hose For Brake Booster (6-Cylinder)

Courtesy of BMW OF NORTH AMERICA, INC.