Audi A4 2002–2005
2nd generation (B6, Typ 8E)
NHTSA data through 12 August 2026992 complaints, 776 with mileageMethod
On this generation, failures are spread across the mileage range, with the middle half between 32,000 and 86,500 miles.
- Rest of the range
- Median
- 200,000+ — 5 complaints (0.6%), plotted separately
- 10%
- 8,000
- 25%
- 32,000
- Median
- 57,000
- 75%
- 86,500
- 90%
- 114,650
Show the numbers
| Mileage | Complaints | Share |
|---|---|---|
| 0–10,000 | 93 | 12.0% |
| 10,000–20,000 | 44 | 5.7% |
| 20,000–30,000 | 41 | 5.3% |
| 30,000–40,000 | 48 | 6.2% |
| 40,000–50,000 | 82 | 10.6% |
| 50,000–60,000 | 99 | 12.8% |
| 60,000–70,000 | 77 | 9.9% |
| 70,000–80,000 | 64 | 8.2% |
| 80,000–90,000 | 45 | 5.8% |
| 90,000–100,000 | 48 | 6.2% |
| 100,000–110,000 | 38 | 4.9% |
| 110,000–120,000 | 30 | 3.9% |
| 120,000–130,000 | 8 | 1.0% |
| 130,000–140,000 | 14 | 1.8% |
| 140,000–150,000 | 13 | 1.7% |
| 150,000–160,000 | 16 | 2.1% |
| 160,000–170,000 | 2 | 0.3% |
| 170,000–180,000 | 4 | 0.5% |
| 180,000–190,000 | 1 | 0.1% |
| 190,000–200,000 | 4 | 0.5% |
| 200,000+ | 5 | 0.6% |
What this can and cannot tell you: these are complaints owners chose to file, not a failure rate. Popular models accumulate more of them simply by being common. How this is built.
Owners filed 992 complaints with NHTSA about the 2002–2005 Audi A4, and 776 of them record the mileage at which the failure happened. That is enough to show not just what fails, but when.
Failures are spread across the mileage range, with the middle half between 32,000 and 86,500 miles. The median is 57,000 miles.
The most-reported areas are the exterior lighting (15.6% of complaints, typically around 65,000 miles), the electrical system (15.2% of complaints, typically around 30,000 miles), the fuel system (10.6% of complaints, typically around 59,000 miles).
4 recall campaigns cover this generation.
What fails, and when
- Exterior lighting65,000median 65,000 miles, middle half 50,000 to 92,000
- Electrical system30,000median 30,000 miles, middle half 9,500 to 68,000
- Fuel system59,000median 58,971 miles, middle half 43,000 to 70,000
- Airbag system70,000median 70,000 miles, middle half 48,000 to 111,000
- Transmission and driveline71,000median 71,000 miles, middle half 40,000 to 97,000
- Engine and its cooling system53,000median 53,000 miles, middle half 32,000 to 72,000
- Visibility equipment49,000median 49,000 miles, middle half 20,000 to 66,000
| System | Complaints | Share | Median | 25–75% |
|---|---|---|---|---|
| Exterior lighting | 155 | 15.6% | 65,000 | 50,000–92,000 |
| Electrical system | 151 | 15.2% | 30,000 | 9,500–68,000 |
| Fuel system | 105 | 10.6% | 59,000 | 43,000–70,000 |
| Airbag system | 101 | 10.2% | 70,000 | 48,000–111,000 |
| Transmission and driveline | 88 | 8.9% | 71,000 | 40,000–97,000 |
| Engine and its cooling system | 76 | 7.7% | 53,000 | 32,000–72,000 |
| Visibility equipment | 50 | 5.0% | 49,000 | 20,000–66,000 |
| Throttle and speed control | 50 | 5.0% | 62,000 | 35,000–95,000 |
| Tyres | 33 | 3.3% | 27,000 | 3,000–60,000 |
| Engine | 29 | 2.9% | 118,000 | 106,000–150,000 |
Which systems, and when
Complaints about this generation are not spread evenly across the vehicle, and the systems that generate the most of them do not all fail at the same point in a car's life. The median failure across all systems here is 57,000 miles; the figures below show which parts of the car run ahead of that and which run behind.
The exterior lighting accounts for 15.6% of complaints (155 reports, 135 of them with a mileage figure), with a median of 65,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 49,850 and 92,000 miles.
The electrical system accounts for 15.2% of complaints (151 reports, 101 of them with a mileage figure), and it fails early — a median of 30,000 miles, well before the vehicle's overall median. Failures clustered this far below the rest of the car usually point to a design or manufacturing problem rather than wear, because wear does not selectively target one system on low-mileage examples. The middle half of these reports falls between 9,700 and 68,000 miles.
The fuel system accounts for 10.6% of complaints (105 reports, 101 of them with a mileage figure), with a median of 58,971 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 43,000 and 70,000 miles.
The airbag system accounts for 10.2% of complaints (101 reports, 53 of them with a mileage figure), with a median of 70,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 48,000 and 111,000 miles.
The transmission and driveline accounts for 8.9% of complaints (88 reports, 73 of them with a mileage figure), with a median of 71,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 40,200 and 97,000 miles.
The engine and its cooling system accounts for 7.7% of complaints (76 reports, 65 of them with a mileage figure), with a median of 53,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 31,800 and 71,700 miles.
Differences between model years
Within this generation, complaint volume is not constant across model years. The 2003 model year drew the most — 282 complaints — while 2002 drew the fewest at 218. The median year sits at 246.
Recalls and what they cover
NHTSA records 4 recall campaigns covering vehicles in this generation. A recall means the manufacturer or the regulator concluded there was a safety defect or a standard was not met, and that a free remedy is owed to owners — including second and later owners.
The campaigns cluster around the airbag system (4). Repeated recalls against the same area of the car generally mean the first remedy did not fully resolve the underlying problem.
Recall status is specific to the individual vehicle, not the model. Checking a VIN against NHTSA's lookup is free and takes under a minute, and it is the only way to know whether a particular car has had the work done.
Reported severity
Of the 992 complaints filed against this generation, 49 reported a crash; 38 reported a fire; 35 reported an injury. Crash-involved reports represent 4.9% of the total.
These are owner-reported outcomes, not verified investigations, and they are not adjusted for how many of these vehicles are on the road. They are included because the distinction between a fault that strands a car and a fault that causes a collision is the one that matters most, and it is not visible in a complaint count alone.
What this means if you are buying one
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 32,000 and 86,500 miles, with a median of 57,000. There is no single mileage threshold to watch, which means condition and maintenance records are more informative than the odometer.
On inspection, the exterior lighting and the electrical system are where this generation's reports concentrate, so those are the areas worth a specific look. The electrical system in particular shows a median failure mileage of 30,000, which gives a concrete number to compare against the odometer of any car you are considering.
None of this is a substitute for a pre-purchase inspection on the individual car. Aggregate patterns describe a population; the example in front of you has its own history.
Documented problems
Transmission — Multitronic CVT 2002–2005 (FWD multitronic–equipped cars)
Failure of the multitronic continuously variable transmission: jerky acceleration, slipping under load, unusual noises and eventual loss of drive, typically emerging at roughly 60,000-95,000 miles. Failures involve both the clutch pack/chain assembly and the transmission control unit. Widely regarded as the defining B6 defect.
Engine — 1.8t Oil Sludge 2002–2005 (1.8T only)
The 1.8T oil sludge/oil starvation problem carries into the B6; Audi's extended engine coverage for sludge spans 1.8T engines through roughly 2005.
By model year
| Year | Complaints | With mileage |
|---|---|---|
| 2002 | 218 | 142 |
| 2003 | 282 | 234 |
| 2004 | 225 | 197 |
| 2005 | 267 | 203 |
Recalls (4)
| Campaign | Date | Component |
|---|---|---|
| 21V470000 | 2021-11-02 | Air Bags:frontal:driver Side:inflator Module |
| 18V427000 | 2018-06-29 | Air Bags:frontal:passenger Side:inflator Module |
| 17V032000 | 2018-03-30 | Air Bags:frontal:passenger Side:inflator Module |
| 16V382000 | 2017-04-28 | Air Bags:frontal:passenger Side:inflator Module |
What owners reported
Right side mirror automatically adjusts when car is in reverse, however when you go back in first the mirror does not return to the original spot. Audi has said that this is a software problem. It has been several months now and they have not fixed the issue. It is a dangerous issue because everytime you need that…
2002 · Visibility equipment
Numberous of failures; windshield washer system, driver's seat motor burned out 3 times, all replaced. *Bf the first day the consumer went to pick up the vehicle from the lot, the battery was dead, however 2 months later the battery was dead again, and 2 months after that the battery died again. The consumer was…
2002 · 885 miles · Visibility equipment
Built from 776 NHTSA complaints with mileage · snapshot 2026-08-12 · open data · reproduce this page