2006 Hummer H3 vs 2006 Porsche Cayenne
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 | 2006 Hummer H3 | 2006 Porsche Cayenne |
|---|---|---|
| NHTSA complaints | 361 | 41 |
| Recall campaigns | 4 | 3 |
| Service bulletins (TSBs) | 737 | 391 |
| Investigations | 0 | 1 |
| Crash reports | 10 | 1 |
| Fire reports | 27 | 1 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 16 | 14–15 |
| Median reported incident mileage | 77,147 mi | 80,253 mi |
Reported problems side by side
| Component | Hummer H3 | Porsche Cayenne |
|---|---|---|
| Electrical System | 96 | 6 |
| Engine | 52 | 3 |
| Engine and Engine Cooling | 35 | 4 |
| Structure | 36 | 0 |
| Visibility | 31 | 0 |
| Suspension | 29 | 0 |
| Visibility/wiper | 29 | 0 |
| Power Train | 20 | 8 |
Symptoms owners describe
| Check engine light | 25 | 0 |
| Won’t start | 23 | 0 |
| Misfire / rough idle | 23 | 0 |
| Electrical failures | 18 | 0 |
| Stalling | 15 | 0 |
| Loss of power | 9 | 0 |
| Rust / corrosion | 8 | 0 |
| Vibration / shaking | 5 | 0 |
2006 Hummer H3
2006 Porsche Cayenne
Compare all Hummer H3 vs Porsche Cayenne 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.