2018 Genesis G80 vs 2018 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 | 2018 Genesis G80 | 2018 Kia Optima |
|---|---|---|
| NHTSA complaints | 94 | 230 |
| Recall campaigns | 6 | 2 |
| Service bulletins (TSBs) | 97 | 155 |
| Investigations | 1 | 2 |
| Crash reports | 8 | 10 |
| Fire reports | 0 | 10 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 18–22 | 25–42 |
| Median reported incident mileage | 15,000 mi | 44,163 mi |
Reported problems side by side
| Component | Genesis G80 | Kia Optima |
|---|---|---|
| Engine | 11 | 129 |
| Electrical System | 22 | 33 |
| Steering | 15 | 12 |
| Power Train | 5 | 18 |
| Service Brakes | 5 | 17 |
| Air Bags | 9 | 9 |
| Engine and Engine Cooling | 3 | 14 |
| Exterior Lighting | 2 | 14 |
Symptoms owners describe
| Oil consumption | 0 | 45 |
| Check engine light | 0 | 27 |
| Stalling | 0 | 26 |
| Vibration / shaking | 0 | 19 |
| Loss of power | 0 | 13 |
| Misfire / rough idle | 0 | 11 |
| Hesitation / surging | 0 | 7 |
| Clunking / rattling | 0 | 6 |
2018 Genesis G80
2018 Kia Optima
Compare all Genesis G80 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.