2004 Cadillac Deville vs 2004 Mercury Grand Marquis
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 | 2004 Cadillac Deville | 2004 Mercury Grand Marquis |
|---|---|---|
| NHTSA complaints | 167 | 347 |
| Recall campaigns | 1 | 1 |
| Service bulletins (TSBs) | 470 | 49 |
| Investigations | 0 | 5 |
| Crash reports | 13 | 17 |
| Fire reports | 4 | 4 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 19 | 18 |
| Median reported incident mileage | 68,686 mi | 82,500 mi |
Reported problems side by side
| Component | Cadillac Deville | Mercury Grand Marquis |
|---|---|---|
| Exterior Lighting | 2 | 206 |
| Steering | 36 | 65 |
| Electrical System | 47 | 40 |
| Visibility | 30 | 7 |
| Air Bags | 25 | 6 |
| Vehicle Speed Control | 3 | 23 |
| Engine | 17 | 4 |
| Power Train | 6 | 9 |
Symptoms owners describe
| Stalling | 15 | 5 |
| Steering problems | 10 | 6 |
| Rust / corrosion | 0 | 16 |
| Hesitation / surging | 0 | 8 |
2004 Cadillac Deville
2004 Mercury Grand Marquis
Compare all Cadillac Deville vs Mercury Grand Marquis 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.