 The 2004 Optima has an issue with the headlamp lenses. It is sort of a cataract on the lens itself. After a while you will not pass an inspection  As I found out and too late they refused to warranty this item since it is there problem, the dealer strung me along to come back and replaced light bulbs. SO that I would have to pay for new lamps Check your Kias and get it done before the warranty is out. I Like the Kia , but do to the poor quality of service networks I will trade for a better brand name next time.