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:

    All-Wheel Drive warning light (AT and CVT models)
    WARNING Continued driving with the AWD warning light flashing can lead to powertrain damage. If the AWD warning light flashes, promptly park in a safe place then check whether all four tires ar ...

    Recommended grade and viscosity
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    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 ...