2015 Kia Optima electrical system problems
135 owner complaints filed with NHTSA name the electrical system on the 2015 Kia Optima — 13% of all complaints for this model year.
What owners report
“The contact owns a 2015 Kia Optima. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the rear taillight socket wiring harness failed to function as intended. The contact was informed that the brake lights were inoperable. The contact stated that…”
filed Jul 29, 2026
“I would say that the time this incident happened I was driving and me and me nephew were in car at time taking to shop to see why it was making a sound like air and all of sudden the car started swerving and slowing down and then it made a pop sound and smoke started coming from the car and I was…”
filed Jul 14, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: ANTI-THEFT S/W LOGIC UPGRADE & DECAL INSTALLATION (CS2303) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are…
CS2303_TSB_R4 · Service Bulletin/Repair Instructions · issued Jun 5, 2024
Electrical System problems in other Optima years
| Year | Reports | Share |
|---|---|---|
| 2020 Optima | 12 | 9% |
| 2019 Optima | 22 | 11% |
| 2018 Optima | 33 | 14% |
| 2017 Optima | 25 | 10% |
| 2016 Optima | 99 | 13% |
| 2014 Optima | 59 | 10% |
| 2013 Optima | 145 | 11% |
| 2012 Optima | 122 | 13% |
| 2011 Optima | 61 | 10% |
| 2010 Optima | 13 | 17% |
| 2009 Optima | 16 | 14% |
| 2008 Optima | 15 | 10% |
Other reported problem areas on the 2015 Kia Optima
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.