See also:

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 than 2 ...

Stopping the engine
WARNING Do not stop the engine when the vehicle is moving. This will cause loss of power to the power steering and the brake booster, making steering and braking more difficult. It could also res ...

Brake booster
If the brake booster does not operate as described in the following, have it checked by your SUBARU dealer. 1. With the engine off, depress the brake pedal several times, applying the same pe ...