34 33 071 Replacing vacuum hose for brake booster

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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.
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.
Remove RIGHT SUSPENSION CROSS-BRACE .

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 :

Check seal (3), replace if necessary.

Fig 1: Identifying Vacuum Line, Brake Booster And Seal

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Remove seal (1).

Release screws (2) and remove bulkhead upper section (3).

Release screws (4).

Fig 2: Identifying Bulkhead Upper Section, Seal And Screws

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Gently pull bulkhead upper section middle (1) upwards and

Feed out line penetration (2) towards top.

Fig 3: Identifying Bulkhead Upper Section Middle And Line Penetration

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Disconnect vacuum line (1) from vacuum pump (2).

Unclip vacuum line (1) in water box from holders and remove.

Fig 4: Identifying Vacuum Line And Pump

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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.

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

Installation note:

Check gasket (3), replace if necessary.

Fig 1: Identifying Vacuum Line, Brake Booster And Seal

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Remove gasket (1).

Unfasten screws (2).

Remove bulkhead upper section (3).

Fig 2: Identifying Bulkhead Upper Section, Screws And Gasket

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Release quick-release coupling (1).

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

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

Courtesy of BMW OF NORTH AMERICA, INC.