Three problems related to fog light switch have been reported for the 2011 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Kia Motor Optima based on all problems reported for the 2011 Optima.
I constantly have to replace headlight bulbs,brake light bulbs and fog light bulbs like 2 to 3 times a year and my lights on dim is too dark and not aligned correctly,for the headlights one side shine up and the other shine down on several occasions I had to replace the whole headlight fixture because the bulb got so hot it melted into the fixture around it.
2011 kia Optima headlights became extremely dim creating visibility and safety concerns during night travel. I changed the lid bulbs hoping to rectify the problem but same issue still remained. High beams work as they should and fog lights puts out more illumination than low beam. Took the vehicle to local kia dealership (fred anderson kia raleigh nc) for diagnostic. Diagnostic revealed that the headlight assemblies had to be replaced. Price to replace assembly is unacceptable for what appears to be a ongoing problem with same year and model vehicle.
Low beam headlights are very dim, to the point of being virtually useless. Fog lights provide more lighting. Replaced bulbs to no avail. High beams work great. Possible that the reflective coating inside hid housing has burned off.