This is a known problem with many Ford vehicles. The rear caliper brackets are made too tight so that even a touch of corrosion (or maybe even none) causes the pads to jam in their slides. I worked at a Ford dealership for a summer and inspected brakes often. Newer Fusion's, Milan's, MKS's, Taurus's, Explorer's, and some others would often come in with low miles and ruined rear brakes. The pads would often be heat scorched from dragging and the material would be cracking and falling apart in extreme cases. I saw a fairly new Explorer come in with 20k miles on it and the owner was furious the pads already were shot. The dealer told him he would not be covered because the brake pads were worn evenly on both sides, which is in fact a good indicator of proper wear, but 20k...nonetheless is too early unless the guy was doing track days with it.

Ford's recommended solution is to use a die grinder to clear the corrosion from behind the bracket abutments and add a grease that inhibits corrosion, I cannot confirm that this does the trick. I have a Fusion and Milan I take care of at home and have replaced both sets of rear pads. All the pads were unevenly worn and seized in the brackets, I had to hammer them out. As an experiment, I ground off the edges of the pads to allow them to fit comfortably in the brackets. We have not put enough miles on them to know if this was a solution. Unfortunately it removes the rust protection from the pads which could compound the problem. I well lubricated the bare ends of the pads and over and under the abutments.

REAR PADS WERE WEARING 3 TIMES FASTER THAN THE FRONT PADS. WEAR NOTED AT DEALER ON INSPECTIONS AT REGULAR OIL CHANGES AT DEALER. FIRST NOTED AT 8422 MILES THAT THE REAR PADS WERE WORN TO 7MM WHILE THE FRONTS WERE AT 10MM AND OIL CHANGES THERE AFTER. AT 22044 MILES AFTER THE 18000 MILE WARRANTY EXPIRED REAR PADS WERE WORN TO 3MM WHILE FRONT PADS WERE AT 9MM AND DEALER REPLACED PADS AT A COST OF $200. COMPLAINED TO DEALER AND FORD THAT THIS WAS PREMATURE WEAR FOR REAR PADS WHILE FRONTS WERE LIKE NEW AND THAT THERE WAS A POSSIBLE MECHANICAL OR ELECTRICAL PROBLEM THAT CAUSED THE EXCESSIVE WEAR AND SHOULD HAVE BEEN PICKED UP AT THE REGULAR OIL CHANGES WHEN FULL BRAKE INSPECTIONS WERE DONE AND THE WEAR WAS NOTED ON THE INSPECTION REPORTS. DEALER NEVER CONTACTED ME REGARDING THE COMPLAINT AFTER COMPLAINING TO THE SERVICE ADVISER THAT HANDLED THE REPAIR. FORD CLOSED THE CASE STATING THAT IT WAS BEYOND THE WARRANTY PERIOD FOR BRAKES AND NEVER ADDRESSED THE ISSUE THAT IT MAY HAVE BEEN A PROBLEM THAT CAUSED THE PREMATURE WEAR AND SHOULD HAVE BEEN COVERED UNDER THE REGULAR WARRANTY BECAUSE IT EXISTED WHILE THE WARRANTY WAS STILL IN EFFECT. BOTTOM LINE, THIS IS HOW FORD AND THIS DEALER HELPED AN 89 YEAR OLD FORMER 75 YEAR DIE HARD LOYAL FORD CUSTOMER WITH HER PROBLEM. I WON'T BE BACK.

I just think that it is totally appalling that i would have to replace back brakes on a brand new vehicle. Should have been covered under the warranty or better yet Ford should recall the 2010 Fusions because quite a few people have had the same problem. Not only that, once the brakes have been replaced most are saying they need replaced again within 15000 miles. Obviously a big Ford issue. I have been a loyal Ford buyer all my life as well as my family. I guess it's time to look for another car company to buy from.