34 33 071 Replacing vacuum hose for brake booster (N55)

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IMPORTANT:

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

Vacuum hose and non-return valve are welded together and are replaced together as a single unit.

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove MOUNTING BRACKET FOR WINDSCREEN WIPER SYSTEM .

IMPORTANT:

Do not kink vacuum line.

Vacuum line and brake lines must not touch each other in area of brake booster!

Contact with surrounding components is only permitted at the designated toothed rings!

Check vacuum line for ease of movement after reinstalling mounting bracket for windscreen wiper system.

Detach vacuum line (1) from brake booster (2).

Installation note:

Check gasket (3), replace if necessary.

Fig 1: Identifying Vacuum Line, Brake Booster And Seal

G06890018

Courtesy of BMW OF NORTH AMERICA, INC.

Remove gasket (1).

Unfasten screws (2).

Remove bulkhead upper section (3).

Fig 2: Identifying Bulkhead Upper Section, Screws And Gasket

G06890023

Courtesy of BMW OF NORTH AMERICA, INC.

Release quick-release coupling (1).

Unclip vacuum line (2) from penetration (3).

Fig 3: Identifying Vacuum Line, Penetration, And Quick-Release Coupling

G06890024

Courtesy of BMW OF NORTH AMERICA, INC.