Rear Disc Brake Assembly: Disassembly

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.

Remove the piston boot.

Fig 1: Removing Piston Boot
Courtesy of SUBARU OF AMERICA, INC.
Place a wooden block in the caliper body as shown in the figure to prevent the piston from jumping out and being damaged.
Gradually apply compressed air via the brake hose installation hole to push the piston out.

Fig 2: Pushing Out Piston Using Compressed Air
Courtesy of SUBARU OF AMERICA, INC.
Remove the piston seal from caliper body cylinder.
CAUTION:
Do not damage the cylinder and piston seal groove.

Fig 3: Removing Piston Seal From Caliper Body Cylinder
Courtesy of SUBARU OF AMERICA, INC.
Remove the pin boot.