Mustang V8-4.6L (2009)
Vacuum Brake Booster: Service and Repair
Brake Booster
Removal and Installation
Vehicles equipped with 5.4L engines
1. Remove the suction accumulator.
All vehicles
2. NOTICE: The brake booster check valve must be disconnected from the brake booster prior to removing the master cylinder or the
master cylinder seal may be drawn into the brake booster.
Disconnect the brake booster check valve from the brake booster to deplete the residual vacuum in the brake booster.
3. Remove the brake master cylinder.
4. NOTICE: Do not service the brake pedal or brake booster without first removing the stoplamp switch and speed control deactivator
switch. These switches must be removed with the brake pedal in the at-rest position. Switch plungers must be compressed for the switch
to rotate in the bracket. Attempting to remove the switch when the plunger is extended (during pedal apply) will result in damage to the
switch.
Remove the stoplamp switch.
5. If equipped, remove the speed control deactivator switch.
