2018 Kia Optima problems by component
230 owner complaints filed with NHTSA for the 2018 Kia Optima, grouped by the component owners reported. Each component links to a detailed breakdown with mileage, severity and owner reports.
| Component | Complaints | Share | Median mileage |
|---|---|---|---|
| Engine → | 129 | 56% | 66,000 mi |
| Electrical System → | 33 | 14% | — |
| Power Train → | 18 | 8% | — |
| Service Brakes → | 17 | 7% | — |
| Engine and Engine Cooling → | 14 | 6% | — |
| Exterior Lighting → | 14 | 6% | — |
| Fuel/propulsion System → | 13 | 6% | — |
| Steering → | 12 | 5% | — |
| Vehicle Speed Control → | 10 | 4% | — |
| Air Bags | 9 | 4% | — |
| Structure | 7 | 3% | — |
| Seat Belts | 5 | 2% | — |
| Electronic Stability Control (esc) | 3 | 1% | — |
| Lane Departure | 3 | 1% | — |
| Firerelated | 1 | 0% | — |
| Forward Collision Avoidance | 1 | 0% | — |
| Latches/locks/linkages | 1 | 0% | — |
| Suspension | 1 | 0% | — |
| Tires | 1 | 0% | — |
| Visibility/wiper | 1 | 0% | — |
| Wheels | 1 | 0% | — |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.