Stop Pin (With Abs) Assembly Note

Install the secondary piston with the piston hole facing the stop pin.
Install the new O-ring onto the stop pin.
Install the stop pin.
Tightening Torque

6.9-9.8 N.m {70-100 kgf.cm, 60.8-86.8 in.lbf}
Push and release the secondary piston assembly to verify that it is held by the stop pin.

Fig 1: Setting Stop Pin (With ABS)
Courtesy of MAZDA MOTORS CORP.