1998 Kia Sephia vs 1998 Oldsmobile Achieva
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Aug 8, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 1998 Kia Sephia | 1998 Oldsmobile Achieva |
|---|---|---|
| NHTSA complaints | 491 | 40 |
| Recall campaigns | 3 | 1 |
| Service bulletins (TSBs) | 19 | 40 |
| Investigations | 8 | 0 |
| Crash reports | 34 | 2 |
| Fire reports | 16 | 2 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 23–24 | 21–24 |
| Median reported incident mileage | 58,500 mi | — |
Reported problems side by side
| Component | Kia Sephia | Oldsmobile Achieva |
|---|---|---|
| Service Brakes, Hydraulic | 250 | 7 |
| Engine and Engine Cooling | 108 | 8 |
| Electrical System | 104 | 12 |
| Power Train | 68 | 2 |
| Fuel System, Gasoline | 51 | 1 |
| Visibility | 43 | 1 |
| Air Bags | 31 | 4 |
| Equipment | 26 | 2 |
Symptoms owners describe
| Vibration / shaking | 53 | 0 |
| Stalling | 48 | 5 |
| Check engine light | 28 | 0 |
| Brake problems | 17 | 0 |
| Won’t start | 12 | 0 |
| Hesitation / surging | 9 | 0 |
| Electrical failures | 8 | 0 |
| Overheating | 8 | 0 |
1998 Kia Sephia
1998 Oldsmobile Achieva
Compare all Kia Sephia vs Oldsmobile Achieva 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.