I also have a ‘14 Challenger, same problem with passenger seat. It’s completely stuck unless I accelerate/brake hard and it slides about an inch. I can replace bulbs and such, but not sure about this. Is the repair possible for me, and if not is it expensive?They come from the seat track, I had it happen to my car just a couple of months out of warranty.
After a couple more fall out your seat will start jamming, then it will stop locking in place.
Mines a '14 and this is the part number for the adjuster/tracks, but verify for your year.