While I find it unusual at this many miles, I am not totally surprised. I have worked on another ST with seized pins and my dad had a seized caliper on his Fusion around the same mileage. I blame myself for not putting the guide pins on the schedule when I get the car prepped for different seasons. I knew last spring when I worked on another ST that it was going to be an issue. I haven't had issues like this before on my previous cars and that is mostly because the brakes would come apart for inspection each spring or fall. The only exception was the SVT Focus, which I didn't own long enough to have issues. That car saw 2 winters before going into storage and then became a Florida car. All of my other cars would have the rotors and calipers removed each spring and fall. I used to track my ZX3 all the time, so the brakes were always coming apart for new pads, rotors, and fluid. On my 2011 Fiesta, I had SVT Focus front brakes for the summer and stock for the winter. Again, each season saw the brakes coming apart. Guide pins were greased and all parts inspected. The ST brakes are so good from the factory, I never needed to take them apart to make changes. I got busy with work and school and didn't take everything apart like I should have. This fall, all of the brake components are coming off for inspection and regrease. I will make this part of the fall/spring schedule along with bleeding every other spring.