34 33 071 Replacing vacuum hose for brake booster (on brake booster)

WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake booster. This makes it easier to remove the vacuum hose.

Necessary preliminary tasks:

Read and comply with General Information .
Remove brake master cylinder

Unlock quick-release fastener (1) and pull out vacuum line (2).

Fig 1: Identifying Quick-Release Fastener And Vacuum Line

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1) from differential pressure sensor.

Unfasten hose clip (2).

Pull off vacuum hose (3).

Pull vacuum hose (4) out of brake booster.

Feed out vacuum hose (4).

Installation:

Replace hose clamp (2).

Check sealing ring (5) in brake booster and replace if necessary.

Fig 2: Identifying Plug Connection, Vacuum Hose, Hose Clamp And Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.