Alright i got a question. I don't own a Mazda but my girlfriend does. Its a 2002 Mazda Protege ES, 4 wheel disc. I have done brake many of times, i know with ford you had to turn the rear piston back in due to the park brake. however yesterday i took off the rear, and the piston looked normal, no grooves or slots for the rear caliper tool. I tried the c-clamp method that everyone knows and the pistons would not good in. I'm thinking seized up calipers?