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:

    Cargo
    The Impreza hatchback has 19 cubic feet of cargo room behind the backseat, which is more than the four-door GTI (14.7) but less than the Vibe (20.1). The cargo floor isn't especially deep, as a go ...

    Unlocking the doors
    Unlocking the doors Press the “” button to unlock the driver’s door. An electronic chirp will sound twice and the turn signal lights will flash twice. To unlock all doors and the rear gate, ...

    Rear differential gear oil
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