Our 2008 had the rear wheel bearing fail at 35,000. I have an 07 F-150 and the front wheel bearing failed at 40,000. Ford replaced both under warranty but now my F150 is making noise in the rear.
A coworker has an 05 explorer and his front bearing failed at 55,000.
I have no doubt that Ford has faulty bearings. I will be making some serious noise if they ever stop replacing them under warranty.