The driver's seat in my 1994 Civic started squeaking from the right hinge a while ago. Recently it's started sinking on that side, to the point where you're sitting pretty cockeyed while driving. To make matters worse, when I took the seat out to investigate, the rear left bolt came out as if there was a nut on the other side, and now I notice there's a crack in the floor coming out of the bolt hole going who-knows how far. The bolt now has nothing to thread into, as presumably the nut on the other side has fallen off somewhere into the floor. So, my questions are: should I replace the bushings in that one hinge or just replace the whole seat? And when I go to do this, is there an easy way to fix the problem with the mounting bolt? I can't find any obvious way to get to the backside of the floor where the seat mounts. Thanks in advance for any help, Isaac