2004 Audi A4 vs 2006 Audi A4
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 Audi A4 | 2006 Audi A4 |
|---|---|---|
| NHTSA complaints | 189 | 295 |
| Recall campaigns | 2 | 3 |
| Service bulletins (TSBs) | 172 | 356 |
| Investigations | 1 | 0 |
| Crash reports | 8 | 8 |
| Fire reports | 3 | 4 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 21–23 | 21–24 |
| Median reported incident mileage | 60,000 mi | 60,000 mi |
Reported problems side by side
| Component | Audi A4 | Audi A4 |
|---|---|---|
| Exterior Lighting | 14 | 159 |
| Air Bags | 26 | 73 |
| Fuel System, Gasoline | 46 | 5 |
| Electrical System | 15 | 21 |
| Power Train | 12 | 14 |
| Engine and Engine Cooling | 18 | 6 |
| Vehicle Speed Control | 16 | 7 |
| Engine | 7 | 15 |
Symptoms owners describe
| Stalling | 31 | 0 |
| Airbag warning light | 9 | 0 |
| Check engine light | 7 | 7 |
| Vibration / shaking | 7 | 12 |
| Loss of power | 6 | 0 |
| Hesitation / surging | 6 | 0 |
2004 Audi A4
2006 Audi A4
Compare all Audi A4 vs Audi A4 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.