i dunno bout the 5th gen but this is what i did to my car to put my 6x9's in. take out back seats, remove side panels, remove speaker pannel behind seat. remove 4 screws from speakers, put new ones in. replace rear speaker panel, put side panels back on w/all plastic clips, put bottom of seat back in with bolt, put top of seats back in. then worry bout wiring after that cause its better to get everything back together since you can do the wiring with the seats down. gl and if your car like that pm me for photos cause id be glad to rip apart my car tomorrow to show you. lol it needs some cleaning anyways