With 15" Wheel

Lift-up the vehicle and remove front wheels.
Remove the caliper bolt.

Fig 1: Removing Caliper Bolt
Courtesy of SUBARU OF AMERICA, INC.
Raise the caliper body and support it.
NOTE: Do not disconnect the brake hose from caliper body.
Remove the pad.

Fig 2: Removing Brake Pad

Courtesy of SUBARU OF AMERICA, INC.

NOTE: If the brake pad is difficult to remove, proceed as follows:

Remove the caliper body from support.
Remove the support.
Place the support in a vise between wooden blocks.

Fig 3: Placing Support In Vise Between Wooden Blocks
Courtesy of SUBARU OF AMERICA, INC.
Attach a rod of less than 12 mm (0.47 in) diameter to the shaded area of the brake pad, and strike the rod with a hammer to drive brake pad out of place.

Fig 4: Identifying Rod Attaching Area

Courtesy of SUBARU OF AMERICA, INC.