2015 Buick Regal vs 2015 Kia Optima
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Aug 7, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2015 Buick Regal | 2015 Kia Optima |
|---|---|---|
| NHTSA complaints | 33 | 1,003 |
| Recall campaigns | 0 | 4 |
| Service bulletins (TSBs) | 1,525 | 200 |
| Investigations | 0 | 4 |
| Crash reports | 1 | 31 |
| Fire reports | 1 | 73 |
| NCAP overall rating | — | 5/5 |
| EPA MPG (combined) | 22–24 | 24–37 |
| Median reported mileage | 36,250 mi | 80,000 mi |
Reported problems side by side
| Component | Buick Regal | Kia Optima |
|---|---|---|
| Engine | 9 | 618 |
| Electrical System | 5 | 135 |
| Structure | 2 | 76 |
| Steering | 1 | 68 |
| Service Brakes | 2 | 49 |
| Power Train | 1 | 49 |
| Fuel/propulsion System | 4 | 44 |
| Service Brakes, Hydraulic | 0 | 40 |
Symptoms owners describe
| Stalling | 0 | 155 |
| Check engine light | 0 | 102 |
| Clunking / rattling | 0 | 70 |
| Loss of power | 0 | 60 |
| Oil consumption | 0 | 31 |
| Rust / corrosion | 0 | 27 |
| Won’t start | 0 | 25 |
| Vibration / shaking | 0 | 22 |
2015 Buick Regal
2015 Kia Optima
Compare all Buick Regal vs Kia Optima years →
Method. Complaints are unique NHTSA reports. A vehicle that sold more units will naturally accumulate more complaints — use shares and read the underlying reports before drawing conclusions.