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Home >> BMW >> 2014 >> ActiveHybrid 7 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes - Repair -- ACTIVEHYBRID 7 >> Brake Booster >> 34 33 505 Removing and installing or replacing brake booster

34 33 505 Removing and installing or replacing brake booster

Necessary preliminary work: 

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
G11177983Courtesy of BMW OF NORTH AMERICA, INC.

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 Brake Pedal Retaining Clip And Nuts
G11177984Courtesy 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: 

Fig 3: Removing Brake Booster From Bulkhead
G11177985Courtesy of BMW OF NORTH AMERICA, INC.

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

Replacement: 

Modify TANDEM BRAKE MASTER CYLINDER .