What breaks most · 1995 to 2010 model years
Audi A4 problems by year
Owners have filed 2,417 safety complaints with NHTSA about the Audi A4 across model years 1995 to 2010. Three years stand out: 2006 for exterior lighting complaints, 1998 for brakes (hydraulic) complaints and 2005 for exterior lighting complaints. The quietest years are 1995, 1996 and 2000.
- Years to check closely: 2006, 1998, 2005
- Fewest complaints: 1995, 1996, 2000
- Complaints on file
- 24171995 to 2010, all trims
- Worst year
- 2006288 complaints
- Crashes reported
- 9238 fires · 62 injuries · 0 deaths
- Typical failure mileage
- 65kMedian where owners gave mileage
- Recall campaigns
- 62Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 1 | 0 | 2 | Speed control and throttle (1) | |
| 89 | 4 | 6 | Electrical system (26) | |
| 98 | 7 | 8 | Electrical system (33) | |
| 254 | 5 | 6 | Brakes (hydraulic) (112) | |
| 190 | 9 | 7 | Brakes (hydraulic) (81) | |
| 94 | 5 | 5 | Brakes (hydraulic) (47) | |
| 128 | 5 | 3 | Electrical system (35) | |
| 179 | 12 | 2 | Electrical system (76) | |
| 200 | 10 | 4 | Powertrain and transmission (41) | |
| 181 | 8 | 3 | Fuel system (46) | |
| 209 | 6 | 4 | Exterior lighting (100) | |
| 288 | 6 | 3 | Exterior lighting (158) | |
| 183 | 4 | 3 | Air bags (111) | |
| 163 | 6 | 4 | Air bags (110) | |
| 113 | 5 | 2 | Engine (41) | |
| 47 | 0 | 0 | Engine (24) |
What fails on the 2006 Audi A4
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Exterior lightingHeadlights, tail lights and bulbs | 55% |
158 | 1 | Shop exterior lighting parts for the 2006 Audi A4 |
| Air bags | 24% |
70 | 4 | Check recalls for air bags on NHTSA.gov |
| Electrical systemAlternators, starters and ignition | 7% |
21 | 0 | Shop electrical system parts for the 2006 Audi A4 |
| Powertrain and transmissionTransmission parts | 5% |
14 | 0 | Shop all powertrain and transmission parts, not filtered to this vehicle |
| EngineEngine gaskets and seals | 5% |
14 | 0 | Shop engine parts for the 2006 Audi A4 |
| Speed control and throttleThrottle and pedal sensors | 2% |
7 | 0 | Shop speed control and throttle parts for the 2006 Audi A4 |
| Engine and coolingRadiators, thermostats and cooling | 2% |
6 | 0 | Shop engine and cooling parts for the 2006 Audi A4 |
| Unknown or other | 2% |
6 | 0 | — |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
My headlights flicker while driving mostly the left but does intermittently go from left to right. Unable to drive car at night. I just bought the car from drive time and the issue started as soon as i left the dealership
-
ABS/brake light just started flashing. The ABS brakes are not working ABS module is the cause. Under hard braking or wet conditions the car slides looses traction. Old part is still in car to expensive to replace right now. Had car looked at by certified mechanic and they told me ABS module is the problem. *nm
-
Headlights dip and continue to flicker and turn off during mild driving. This becomes dangerous when driving at night and the lights turn off due to the flicker.
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 30, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Audi A4 years have the most problems?
By NHTSA complaint volume, 2006, 1998, 2005 carry the most filings on the Audi A4. The 2006 alone has 288 complaints, led by exterior lighting.
What is the most common Audi A4 problem?
On the 2006 model year, the most-reported component is exterior lighting with 158 complaints. The table above lists the top components for every year.
At what mileage do Audi A4 problems start?
The median mileage at failure across all Audi A4 complaints that include mileage is about 65,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.