2004 Chevrolet Impala 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 Chevrolet Impala | 2004 Mercury Grand Marquis |
|---|---|---|
| NHTSA complaints | 1,072 | 347 |
| Recall campaigns | 4 | 1 |
| Service bulletins (TSBs) | 495 | 49 |
| Investigations | 0 | 5 |
| Crash reports | 44 | 17 |
| Fire reports | 21 | 4 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 20–22 | 18 |
| Median reported incident mileage | 70,000 mi | 82,500 mi |
Reported problems side by side
| Component | Chevrolet Impala | Mercury Grand Marquis |
|---|---|---|
| Electrical System | 681 | 40 |
| Exterior Lighting | 104 | 206 |
| Steering | 62 | 65 |
| Engine | 71 | 4 |
| Vehicle Speed Control | 41 | 23 |
| Power Train | 47 | 9 |
| Service Brakes, Hydraulic | 51 | 4 |
| Engine and Engine Cooling | 36 | 10 |
Symptoms owners describe
| Won’t start | 73 | 0 |
| Stalling | 50 | 5 |
| Overheating | 29 | 0 |
| Vibration / shaking | 19 | 0 |
| Check engine light | 14 | 0 |
| Shifting problems | 14 | 0 |
| Rust / corrosion | 14 | 16 |
| Clunking / rattling | 12 | 0 |
2004 Chevrolet Impala
2004 Mercury Grand Marquis
Compare all Chevrolet Impala 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.