Caliper Installation Note

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Clean the exposed area of the piston.
Rotate the piston clockwise slowly using the Caliper Piston Socket (49-F043-002) and push the piston completely until the piston grooves are in the position shown in the illustration. See Fig 1.
Install the caliper.

Fig 1: Identifying Caliper Piston Socket

Courtesy of MAZDA MOTORS CORP.