One problem related to wiring has 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.
Right low beam needed constant changing (1 every 4-6 months). Within the last 6 months, I had changed the bulb, 2 weeks later, the low beam light was not working again. Noticed a white film on inside of light assembly. Upon investigation, I discovered the wiring caught fire and melted the connector for the light bulb. I purchased a new assembly, only to have the exact same thing happen. This is a huge safety concern. Firstly, the low beam lighting is absolutely horrible in this car to begin with, now I'm running off of one light. After looking into complaints online, I see this problem is prevalent across the board with this car. Kia is a multi million dollar company, you need to stand behind your product and have the mindset of putting your customers safety as a priority. I work as a firefighter/emt and I'd hate to arrive on scene of someone that was killed due to kia's faulty unsafe product. Especially of one that could be prevented by fixing these problems that you know is a manufacturer defect. Shame on you kia for putting people at risk.