Kia Optima Forum : “what problems does it have”

Two good sites to find info on this are listed here:

http://www.mycarstats.com/auto_Complaints/KIA_OPTIMA_Complaints.asp

Also check out www.carsurvey.org, for real-person complaints and experiences with a variety of vehicles.

Here are all CarGurus' Kia Optima reviews: http://www.cargurus.com/Cars/Reviews-d158-r6186-Kia-Optima.html. Sounds like owners have had issues with build quality & electrical issues.