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 depress the pedal much harder than normal and the braking distance will increase.

    See also:

    REV indicator light and buzzer (STI)
    The REV alarm system issues a warning using the REV indicator light (and a buzzer if additionally selected) when the engine speed reaches a level previously set using the trip knob. If you press th ...

    Before checking or servicing in the engine compartment
    WARNING ● Always stop the engine and apply the parking brake to prevent the vehicle from moving. ● Always let the engine cool down. Engine parts become very hot when the engine is ru ...

    Limited slip differential (LSD) (STI)
    The LSD provides optimum distribution of power according to the difference in revolutions between the right and left wheels that may be caused by certain driving conditions, thereby improving driving ...