Originally Posted by
Shawn
The rear caliper slider design corrodes the bottom hole under the rubber that the pin slides in. As it corrodes it gets tighter until it seizes.
You can fix this by removing the caliper and then carefully removing the rubber insert (Mazda sells them separately) and use a file or a Dremel motor tool to remove the white corrosion in the slider hole.
Then lube the Sh#$ out of it, inside and out, repeat ever two years. I don't believe Mazda does this cleaning and lube either for the $300. They never did on my cars.