2015 Kia Optima engine and engine cooling problems
30 owner complaints filed with NHTSA name the engine and engine cooling on the 2015 Kia Optima — 3% 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 vehicle stalled. During the failure, several unknown warning lights flashed on the instrument panel and there was smoke coming from under the hood of the vehicle. The contact exited the vehicle…”
filed Jul 23, 2026
“The contact owned a 2015 Kia Optima. The contact stated that while driving to the residence, the vehicle caught on fire. The contact stated that while at a traffic light, the vehicle suddenly shut off. After exiting the vehicle, the hood was opened, and there was smoke coming from the engine…”
filed Jul 14, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine and Engine Cooling problems in other Optima years
| Year | Reports | Share |
|---|---|---|
| 2020 Optima | 8 | 6% |
| 2019 Optima | 3 | 1% |
| 2018 Optima | 14 | 6% |
| 2017 Optima | 7 | 3% |
| 2016 Optima | 24 | 3% |
| 2014 Optima | 14 | 2% |
| 2013 Optima | 41 | 3% |
| 2012 Optima | 19 | 2% |
| 2011 Optima | 7 | 1% |
| 2010 Optima | 2 | 3% |
| 2009 Optima | 2 | 2% |
| 2008 Optima | 5 | 3% |
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.