Why doesn't the lowbeams work but the highbeams do?

Hello, the low beam filament in each bulb may be burned out. This is what I would check first. Lower percentage concerns could be socket, wiring, switch and module related - start with the inexpensive basics. By the way, if under base warranty of 5 years / 60,000 miles - your bulbs may have coverage under warranty with Kia. Let THEM do all the work!