1989 Mercury Grand Marquis vs 1989 Pontiac Bonneville
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 | 1989 Mercury Grand Marquis | 1989 Pontiac Bonneville |
|---|---|---|
| NHTSA complaints | 58 | 28 |
| Recall campaigns | 0 | 0 |
| Service bulletins (TSBs) | 28 | 0 |
| Investigations | 1 | 0 |
| Crash reports | 8 | 2 |
| Fire reports | 17 | 0 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 18 | 19 |
| Median reported incident mileage | — | — |
Reported problems side by side
| Component | Mercury Grand Marquis | Pontiac Bonneville |
|---|---|---|
| Electrical System | 16 | 4 |
| Vehicle Speed Control | 14 | 2 |
| Service Brakes, Hydraulic | 5 | 8 |
| Engine and Engine Cooling | 6 | 1 |
| Power Train | 6 | 1 |
| Fuel System, Gasoline | 5 | 0 |
| Structure | 2 | 3 |
| Seat Belts | 1 | 4 |
1989 Mercury Grand Marquis
1989 Pontiac Bonneville
Compare all Mercury Grand Marquis vs Pontiac Bonneville 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.