Yea hard to describe. I looked on the interweb yesterday and somewhere along they changed the floor section that connects to the back seat to a shorter panel, 10 inches or so. Mine is almost the full length of the seat back. This panel hits the rear floor edge when I fold my seat back. Maybe I have the side arms adjusted wrong, setting the upper seat back to far and then there is not enough clearance. Also these are the only rubber bumper I have, they don't seem to do anything!