Toyota Prius Prime vs KIA Optima Hybrid
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 | Toyota Prius Prime | KIA Optima Hybrid |
|---|---|---|
| Complaints on file | 165 | 406 |
| Model years covered | 2017–2024 | 2011–2020 |
| Worst model year | 2017 | 2012 |
| Best model year | 2019 | 2015 |
| Crashes reported | 38 | 31 |
| Fires reported | 0 | 21 |
| Injuries reported | 12 | 18 |
| Deaths reported | 0 | 0 |
| Most complained-about part | Electrical System | Engine & Cooling |
| Share of complaints involving harm | 30.3% | 17.2% |
Toyota Prius Prime by year
What breaks
Electrical System
24
14.5%
Windows, Mirrors & Wipers
20
12.1%
Transmission & Drivetrain
13
7.9%
Driver Assist & Collision Avoidance
13
7.9%
Other & Unspecified
13
7.9%
Brakes
12
7.3%
Acceleration & Cruise Control
8
4.8%
Fuel & Propulsion
8
4.8%
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%