34 33 505 Removing and installing or replacing brake booster

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove rear left DOME CROSS-BRACE
Remove left FOOTWELL TRIM
In vehicles with coolant expansion tank in the front left side panel: Remove COOLANT FILLER NECK

After completing repair work, bleed BRAKE SYSTEM WITH DSC .

Extract brake fluid out of expansion tank.

Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ .

Disconnect vacuum line (2).

Installation note:

Check gasket (3), replace if necessary.

Fig 1: Identifying Brake Lines, Vacuum Line And Gasket

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Detach retaining clip (1) on brake pedal. Pull out locking pin.

Unscrew nuts (2).

Installation note:

Replace self-locking nuts.

Tightening torque 35 11 1AZ .

Fig 2: Identifying Retaining Clip And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not use any force when removing and installing the brake booster; the brake booster can be damaged under certain circumstances.
Brake lines must not be bent.

Carefully pull brake booster (1) out of bulkhead and tilt out.

Installation note:

Make sure seal (2) is present and correctly seated.

Replacement:

Remount TANDEM BRAKE MASTER CYLINDER .

Fig 3: Identifying Brake Booster And Seal

Courtesy of BMW OF NORTH AMERICA, INC.