2009 Hyundai Sonata vs 2009 Mercury Grand Marquis
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 | 2009 Hyundai Sonata | 2009 Mercury Grand Marquis |
|---|---|---|
| NHTSA complaints | 460 | 26 |
| Recall campaigns | 2 | 2 |
| Service bulletins (TSBs) | 61 | 16 |
| Investigations | 3 | 0 |
| Crash reports | 21 | 3 |
| Fire reports | 11 | 1 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 22–25 | 19 |
| Median reported incident mileage | 68,783 mi | — |
Reported problems side by side
| Component | Hyundai Sonata | Mercury Grand Marquis |
|---|---|---|
| Service Brakes | 64 | 4 |
| Electrical System | 61 | 4 |
| Engine | 56 | 2 |
| Electronic Stability Control (esc) | 51 | 0 |
| Power Train | 41 | 2 |
| Structure | 40 | 1 |
| Service Brakes, Hydraulic | 34 | 2 |
| Vehicle Speed Control | 31 | 4 |
Symptoms owners describe
| Stalling | 36 | 0 |
| Check engine light | 26 | 0 |
| Rust / corrosion | 24 | 0 |
| Brake problems | 11 | 0 |
| Vibration / shaking | 9 | 0 |
| Airbag warning light | 9 | 0 |
| Hesitation / surging | 6 | 0 |
2009 Hyundai Sonata
2009 Mercury Grand Marquis
Compare all Hyundai Sonata 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.