Brake booster

The brake booster uses engine manifold vacuum to assist braking force. Do not turn off the engine while driving because that will turn off the brake booster, resulting in poor braking power.

The brakes will continue to work even when the brake booster completely stops functioning. If this happens, however, you will have to push the pedal much harder than normal and the braking distance will increase.

    See also:

    Tripped sensor identification
    The security indicator light flashes when the alarm system has been triggered. Also, the number of flashes indicates the location of unauthorized intrusion or the severity of impact on the vehicle. ...

    Checking the brake pedal free play
    1) 0.02 – 0.08 in (0.5 – 2.0 mm) Stop the engine and firmly depress the brake pedal several times. Lightly pull the brake pedal up with one finger to check the free play with a force of less ...

    EXTERIOR
    The 2011 STi oozes speed. My test vehicle was the new four-door wide-body sedan with an intimidating-looking rear spoiler intended to amplify the car's aerodynamics. The spoiler definitely took a ...