Rear Disc Brake Assembly: Disassembly

WARNING: This page is about a different car, the 2015 Subaru Outback and 2015 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

The piston cannot be removed from the caliper body assembly.
Do not remove the parking brake actuator assembly except when there are system malfunctions (such as emergency release of parking brake or abnormal actuator) or when the caliper is replaced. When the parking brake actuator assembly is reused, always replace the O-ring with a new part contained in the caliper body assembly.

Remove mud and foreign matter from the caliper body assembly.
Remove the piston boot.

Fig 1: Identifying Piston Boot
Courtesy of SUBARU OF AMERICA, INC.
Remove the bushing from the support - rear disc brake.

Fig 2: Removing Rear Disc Brake Support Bushing
Courtesy of SUBARU OF AMERICA, INC.