The ones in the fender, or the bumper? They are both held in by spring retention. the fender ones, just slide to whichever side lets it move and remove. The bumper, push in on the front or rear end (can't remember) of the reflector and slide backward. May need to coax it forward with a flat blade screwdriver tip covered with electrical tape. Dirst and grit builds up underneath it and can cause considerable friction.