I replaced my drivers side axle and wheel bearings, and by "I replaced" I mean, I payed someone to do it after spending several hours attempting to do so myself. Third owner of a 2002 4.4 and the previous owners spent a lot of time driving around on salt maintained winter roads. That really made things difficult when trying to unseat very corroded bolts.
I noticed the torn CV boot when replacing pads and rotors. First time driving after getting the x5 back and the brake light warning let me know I should have done the rears while doing the front.