2005 Mercury Grand Marquis vs 2005 Pontiac Bonneville
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Aug 7, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2005 Mercury Grand Marquis | 2005 Pontiac Bonneville |
|---|---|---|
| NHTSA complaints | 487 | 27 |
| Recall campaigns | 4 | 0 |
| Service bulletins (TSBs) | 32 | 495 |
| Investigations | 4 | 0 |
| Crash reports | 24 | 2 |
| Fire reports | 5 | 1 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 19 | 18–21 |
| Median reported incident mileage | 74,000 mi | 119,000 mi |
Reported problems side by side
| Component | Mercury Grand Marquis | Pontiac Bonneville |
|---|---|---|
| Exterior Lighting | 292 | 0 |
| Electrical System | 75 | 8 |
| Air Bags | 67 | 12 |
| Vehicle Speed Control | 39 | 0 |
| Seat Belts | 36 | 0 |
| Steering | 20 | 5 |
| Structure | 11 | 0 |
| Service Brakes, Hydraulic | 10 | 0 |
Symptoms owners describe
| Airbag warning light | 46 | 9 |
| Stalling | 18 | 0 |
2005 Mercury Grand Marquis
2005 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.