WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Clean the inside of the caliper body using brake fluid.
Apply a coat of brake fluid to piston seal and install the piston seal to the caliper body groove.
Apply a coat of brake fluid to the inner surface of cylinder and the entire outer surface of the piston.
Apply grease contained in the piston kit to the boot, and install it to the groove at the end of the cylinder.
Insert the piston into cylinder.
CAUTION:
Do not force the piston into cylinder.
Position the boot in the grooves on piston and cylinder.

Fig 1: Identifying Piston, Piston Boot, Caliper Body And Piston Seal
Courtesy of SUBARU OF AMERICA, INC.
Apply grease contained in the piston kit to the cylinder inner surface, pin, bushing outer surface, and boot grooves.

Fig 2: Identifying Grease Applying Areas On Pin Boot And Lock Pin Or Guide Pin
Courtesy of SUBARU OF AMERICA, INC.
Insert the pin boot into the support.
Install the pin boot to the support, and then insert the pin into the specified position.
CAUTION:
Insert pin into position, and make sure that it slides and seats properly.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Rear Disc Brake Assembly: Assembly

Use the Manual With the Right Hardware

When to See a Mechanic