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:
Legacy in the Market
Subaru calls the 2010 Legacy a response to what its customers wanted —
durability, value and performance, with a bit more cabin room. Those customers
ought to be happy: The Legacy is all that, and ...
Use of engine braking
Remember to make use of engine braking in addition to foot braking. When descending
a grade, if only the foot brake is used, the brakes may start working improperly
because of brake fluid overheat ...
Arming the system
CAUTION
In passive mode, the system will automatically activate the alarm but WILL NOT
automatically lock the doors. In order to lock the doors you must either lock them
as indicated in step 4 be ...