I was changing the pads and heard about the EPB service mode after I'd already taken the driver side apart. Went ahead and did the procedure, heard the brakes actuate, then I realized that I didn't remember if the parking brake was engaged or if I'd released them prior to the service mode procedure. The caliper piston was extended and I tried to press it back in but didn't want to force it too hard. Then I tried to take it out of service mode to see if parking brake would be engaged or disengaged afterword. Brakes actuated again but caliper piston was still fully extended. If it did indeed go back out of service mode, now it won't go back in to service mode. Piston still does not want to be pressed back into caliper. To top it all off, the boot has pulled away from the piston and leaked a tablespoon or so of fluid. Can the boot be replaced? Whole caliper? Any help or suggestions would be appreciated.

 

You need to get the caliper overhauled by a brake specialist.

 

I did the same mistake,except mine was done a service station where I went to do my rear brakes. I warned them about the EPB and they kept telling me 'we got the scanners we know''. I ended up going to Mazda dealer where they installed a new caliper for $598.00.