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Home >> Porsche >> 2013 >> Boxster Base, Automatic DCT Trans >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> 47 - Brakes - Hydraulic Brake System, Regulator -- (981) BOXSTER/CAYMAN >> WM 477019 Removing And Installing Brake Booster (All Models) >> Removing And Installing Brake Booster >> Removing Brake Booster

Removing Brake Booster

  1. Disengage push rod for brake booster (in the footwell).
    1. 1.1. Unlocking Tool 9767 -1-  must be guided from below in front of the ball joint on the push rod -2-  .
    2. 1.2. Press the unlocking tool together -arrows A-  and separate the ball joint from the securing clip -3-  (-arrow B-  ).
    Fig 1: Disengaging Push Rod From Brake Booster
    G10026680Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. Disconnect the vacuum line from the brake booster.
  3. Unscrew fastening screws -arrows-  .

    Shown as an example as the brake master cylinder is already removed at this time.

    Fig 2: Identifying Brake Booster Bolts
    G10026681Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Information 

    When removing and fitting the brake booster -1-  , make sure not to damage the boot -4-  on the push rod -2-  .

    The seal between the brake booster and body -3-  must always be replaced.

    Fig 3: Identifying Brake Booster Components
    G10026682Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  4. Remove the brake booster.


  1. Disengage push rod for brake booster (in the footwell).
    1. 1.1. Unlocking Tool 9767 -1-  must be guided from below in front of the ball joint on the push rod -2-  .
    2. 1.2. Press the unlocking tool together -arrows A-  and separate the ball joint from the securing clip -3-  (-arrow B-  ).
    Fig 1: Disengaging Push Rod From Brake Booster
    G10026688Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. Disconnect the vacuum line from the brake booster.
  3. Unscrew fastening screws -arrows-  .

    Shown as an example as the brake master cylinder is already removed at this time.

    Fig 2: Identifying Brake Booster Bolts
    G10026689Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Information 

    The seal between the brake booster and body -3-  must always be replaced.

    When removing and fitting the brake booster -1-  , make sure not to damage the boot -4-  on the push rod -2-  .

    Fig 3: Identifying Brake Booster Components
    G10026690Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  4. Remove the brake booster.