2003 Chevrolet Impala vs 2003 Mercedes-Benz S430
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 | 2003 Chevrolet Impala | 2003 Mercedes-Benz S430 |
|---|---|---|
| NHTSA complaints | 694 | 26 |
| Recall campaigns | 5 | 0 |
| Service bulletins (TSBs) | 477 | 38 |
| Investigations | 1 | 0 |
| Crash reports | 32 | 0 |
| Fire reports | 32 | 1 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 20–22 | 18 |
| Median reported incident mileage | 85,000 mi | 93,835 mi |
Reported problems side by side
| Component | Chevrolet Impala | Mercedes-Benz S430 |
|---|---|---|
| Electrical System | 264 | 12 |
| Exterior Lighting | 103 | 3 |
| Engine | 88 | 2 |
| Engine and Engine Cooling | 80 | 0 |
| Service Brakes, Hydraulic | 54 | 0 |
| Air Bags | 39 | 1 |
| Power Train | 30 | 2 |
| Steering | 30 | 1 |
Symptoms owners describe
| Won’t start | 69 | 0 |
| Stalling | 56 | 0 |
| Rust / corrosion | 21 | 0 |
| Overheating | 18 | 0 |
| Vibration / shaking | 15 | 0 |
| Check engine light | 12 | 0 |
| Hesitation / surging | 12 | 0 |
| Loss of power | 11 | 0 |
2003 Chevrolet Impala
2003 Mercedes-Benz S430
Compare all Chevrolet Impala vs Mercedes-Benz S430 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.