Subaru WRX Manuals 2025 WRX Owner’s Manual | Page 310

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Braking
7-11. Braking & Braking Tips
WARNING s07ak
s07ak01
Never rest your foot on the brake pedal while driving. This can cause dangerous overheating of the brakes and needless wear on the brake pads.
! When the brakes get wet s07ak0101
When driving in rain or after washing the vehicle, the brakes may get wet. As a result, brake stopping distance will be longer. To dry the brakes, drive the vehicle at a safe speed while lightly depressing the brake pedal to heat up the brakes.
! Use of engine braking s07ak0102
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 overheating, caused by overheated brake pads. To help prevent this, shift into a lower gear to get stronger engine braking.
! Braking when a tire is punctured s07ak0103
Do not depress the brake pedal suddenly when a tire is punctured. This could cause
a loss of control of the vehicle. Keep driving straight ahead while gradually reducing speed. Then slowly pull off the road to a safe place.
& Brake System s07ak02
! Two separate circuits s07ak0201
Your vehicle has a dual circuit brake system. Each circuit works diagonally across the vehicle. If one circuit of the brake system should fail, the other half of the system still works. If one circuit fails, the brake pedal will go down much closer to the floor than usual and you will need to press it down much harder. And a much longer distance will be needed to stop the vehicle.
! Vacuum brake booster( models with the vacuum brake booster) s07ak0202
The vacuum brake booster uses a vacuum pump to assist braking force. Do not turn off the engine while driving because that will turn off the vacuum brake booster, resulting in poor braking power.
The brakes will continue to work even when the vacuum 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.
! Supplemental booster function when vacuum pressure fails s07ak020201
While the ignition switch is turned“ ON” and the engine is running, the supplemental booster function operates when the brake booster performance is decreased due to insufficient vacuum boost.
When the brake pedal is depressed while the supplemental booster function is operating, an operation sound and brake pedal vibration may be generated. This is not a malfunction.
! Electronic brake booster( models with the electronic brake booster) s07ak0207
The vehicle is equipped with an electronic brake booster to provide additional braking force. Do not turn off the ignition switch 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, you will have to depress the pedal much harder than during normal braking, and the braking distance will increase.
NOTE
When the following operations are performed, an operating sound from the electronic brake boost control