Though not nearly as bad as the EVOVIII.
http://www.4doorzoom.1hwy.com/mazda6/problems/rust.html
http://mazda6club.com/forums/read.php?TID=9107
http://www.4doorzoom.1hwy.com/mazda6/problems/rust.html
http://mazda6club.com/forums/read.php?TID=9107