This has happened to mine, i still aint fixed it yet. Basically it depends what side? i have a bolt come loose at the front right and that is a star allen key bolt, but the whole thread has come out as well, if its the side drive the bolt out and re-thread the hole, if its the other side its not so simple cause on the other side it isn't attached by a bolt its welded to the sub frame, so the seat can move back and forward, with that u need to re-weld the metal or just get a new seat, try scrap yards cheapest place to get them
Moose, February 2005