2007 Subaru Outback Owner's Manual - Page 249

7-20 Starting and operating functioning. If this happens, however, you will have to push the pedal much harder than normal and the braking distance will increase. NOTE NOTE When you depress the brake pedal suddenly, the brake pedal might wiggle. This is a normal operation phenomenon, and it is not a malfunction. Brake assist is a driver assistance system. It assists the brake power when the driver cannot depress the brake pedal strongly and the brake power is insufficient. Brake assist generates the brake power according to the speed at which the driver depresses the brake pedal. Disc brake pad wear warning indicators Some sound accompanying operation of the vacuum pump may be heard from the engine compartment during driving. This does not indicate a fault. Brake assist system Do not be overconfident about the brake assist. It is not a system that brings more braking ability to the vehicle beyond its braking capability. Always use the utmost care when driving regarding vehicle speed and safe distance. 700040 The disc brake pad wear warning indicators on the disc brakes give a warning noise when the brake pads are worn. If a squeaking or scraping noise is heard from the disc brakes while braking, immediately have your vehicle inspected by the nearest SUBARU dealer. When you need to brake suddenly, continue depressing the brake pedal strongly to bring the effect of the brake assist.