The issue is the phenolic pistons tend to seize pretty firmly in the bore. Even if you broke that piston free, there's a good chance the next time the car sits for an extended period of time it will seize up again. Your best course of action would be to replace the piston, clean up the piston bore and rebuild the caliper.
Since a reman is $40, it's just easier to do that.
Like i said before, VERY common problem on the 99-04 Mustang V6/GT if the car sits for a period of time...especially with brake fluid that has not been bled for a while and contains moisture.
Since a reman is $40, it's just easier to do that.
Like i said before, VERY common problem on the 99-04 Mustang V6/GT if the car sits for a period of time...especially with brake fluid that has not been bled for a while and contains moisture.