One problem related to gas recirculation valve (egr valve) has been reported for the 2015 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Kia Motor Optima based on all problems reported for the 2015 Optima.
While driving back from lake havasu to seal beach(over 308 miles away); 100 miles in towards destination, my car suddenly was stalled; loosing complete power of even pressing the signal light or emergency light. I still had 206 miles left to destination. Stuck in the middle of nowhere, no air, no power to lower the windows and heat quickly rising to 100 degrees and trying to get back phone reception to call in for towing service. I was then able to get through to aaa. I was informed that I was over 60 miles from needles and 78 miles away from barstow and aaa could not find a tow truck that could be there less than 2 hours from the time I called, (total wait was 2 1/2 hrs) after going through 2 tow trucks and getting to Kia Motors in cerritos; I was told the following day that the motor needed to be replaced. I asked whether they had a recall on this issue and service tech did not want to admit they had one. I stated to him that I was informed by a mechanic and confirming through your web site that they did have a recall since January of this year. Service rep then confessed they did. Kia is waiting 2-4 weeks for motor to arrive. I currently have been provided a rental, which kia now has taken responsibility in paying for it. I will inform everyone on how this claim goes, once the repairs are completed.