Are you talking about the electric lock buttons or the manual lock button itself that sits in with door handle? Its hard to say if you'll need to replace it or not with out looking to see if it just popped out or the plastic that holds it in place broke. The actual switch panel containing your window/lock switches is easy to remove. You just take a flat blade screw driver and you can pry up on the back/bottom of the switch panel. The whole thing is just clipped in place, so by prying gently on the bottom it should lift the entire panel with out a problem. Once you have it out you can unplug everything (if you need to) to inspect the button that popped out to see if its just out of place or broke.