KIA Optima Hybrid vs Mazda RX-8
Both cars' complete complaint records, side by side.
Read the totals carefully. NHTSA publishes no sales figures, so the car that sold more collects more complaints regardless of quality. The rows worth weighing are the proportions — the share of complaints that involved harm, and which part dominates.
| Measure | KIA Optima Hybrid | Mazda RX-8 |
|---|---|---|
| Complaints on file | 406 | 1,004 |
| Model years covered | 2011–2020 | 2004–2011 |
| Worst model year | 2012 | 2004 |
| Best model year | 2015 | 2008 |
| Crashes reported | 31 | 35 |
| Fires reported | 21 | 17 |
| Injuries reported | 18 | 30 |
| Deaths reported | 0 | 0 |
| Most complained-about part | Engine & Cooling | Transmission & Drivetrain |
| Share of complaints involving harm | 17.2% | 8.2% |
KIA Optima Hybrid by year
What breaks
Engine & Cooling
150
36.9%
Electrical System
69
17.0%
Brakes
35
8.6%
Transmission & Drivetrain
31
7.6%
Other & Unspecified
27
6.7%
Steering
20
4.9%
Acceleration & Cruise Control
17
4.2%
Fuel & Propulsion
15
3.7%
Mazda RX-8 by year
What breaks
Transmission & Drivetrain
238
23.7%
Engine & Cooling
194
19.3%
Airbags
116
11.6%
Steering
112
11.2%
Fuel & Propulsion
72
7.2%
Electrical System
47
4.7%
Other & Unspecified
36
3.6%
Body & Structure
34
3.4%