On certain models the drivers seat bushings can wear out and the seat can rock back and forth. Replacing the bushings are needed to repair this issue.Google+
Car Problem Reports
Honda Civic Drivers Seat Bushings Can Wear Out
Honda Civic Problem
Average Mileage: 95,185 mi (40,000 mi - 150,000 mi)
Visitor, 2003 Honda Civic, 130,000 mi
Driver's seat bushings wear out. Took several attempts to convince dealer to repair. Happened by 60000 miles.
My driver's seat rocks back and forth a little. I haven't fixed it yet.
Driver seat rocks back and forth
Visitor, 2002 Honda Civic, 150,000 mi
Replacing the bushings is only a temporary fix due to the poor design of the seat adjustment mechanism. They will break again. There are more permanent DIY fixes on internet forums.
Visitor, 2003 Honda Civic, 75,000 mi
Visitor, 2003 Honda Civic, 53,000 mi
left it as-is for past 70000 miles.
Visitor, 2005 Honda Civic
Seat rattles around when cornering, or rapidly braking or accelerating
Seat is unstable and rocks. I had this fixed 7 years ago and need to have it fixed again.
Visitor, 2002 Honda Civic, 115,000 mi
Both left and right front compliance bushings are cracked - the driver side is cracked all the way through. The car sounds like an old jalopy when driving on uneven gravely roads or terrain.
Visitor, 2002 Honda Civic, 50,000 mi
Repaired under warranty once, happened again once out of warranty