Please check this thread out for the trans mount bolt issues. I have read of at least 10 folks who have had this issue on many different sites, but this one is a sort of collection of most of them. This site contains pictures and detailed info on what others are experiecning and what they have found while checking their bolt.
http://www.mazda3 forums.com/index.php?topic=68975.0
(take out space between mazda3 and forums)
