Audi A4 2002–2005 problems by year and mileage
2nd generation (B6, Typ 8E)
NHTSA data through 24 September 2026804 complaints, 627 with mileageMethod
Which year is yours? Tap it to see what breaks on it.
The 2002 Audi A4
Close- Median failure report
- 30,000 mi
- Complaints filed
- 181
- Recalls naming this year
- 1
Most reported on the 2002
- Electrical system76 reports · median 9,500 mi
- Engine and its cooling system28 reports
- Exterior lighting17 reports
1 recall campaign names the 2002: Air bags — frontal. Not every car in a campaign is affected — check the VIN at NHTSA. Recall repairs are free.
The 2003 Audi A4
Close- Median failure report
- 60,000 mi
- Complaints filed
- 215
- Recalls naming this year
- 3
Most reported on the 2003
- Transmission and driveline44 reports · median 75,000 mi
- Fuel system42 reports · median 55,000 mi
- Electrical system32 reports
3 recall campaigns name the 2003: Fuel system, gasoline — delivery; Exterior lighting — headlights. Not every car in a campaign is affected — check the VIN at NHTSA. Recall repairs are free.
The 2004 Audi A4
Close- Median failure report
- 60,000 mi
- Complaints filed
- 189
- Recalls naming this year
- 2
Most reported on the 2004
- Fuel system46 reports · median 61,000 mi
- Airbag system26 reports
- Engine and its cooling system18 reports
2 recall campaigns name the 2004: Air bags — frontal; Exterior lighting — headlights. Not every car in a campaign is affected — check the VIN at NHTSA. Recall repairs are free.
The 2005 Audi A4
Close- Median failure report
- 58,000 mi
- Complaints filed
- 219
- Recalls naming this year
- 3
Most reported on the 2005
- Exterior lighting101 reports · median 59,000 mi
- Airbag system54 reports
- Electrical system24 reports
3 recall campaigns name the 2005: Air bags — frontal. Not every car in a campaign is affected — check the VIN at NHTSA. Recall repairs are free.
Each tile shows the median mileage at which that model year’s failures were reported. The 2003 reports latest and the 2002 earliest, but part of that gap is age: the 2002 has had 1 more year on the road to accumulate mileage.
The short answer
“Is the 2002–2005 Audi A4 reliable?”
- Median of reported failures
- 57,000 mi
- 90% of reports came by
- 112,000 mi
- Reports with mileage
- 627
- Recalls
- 7
Most reported
- Exterior lighting19.3% of complaints · median 65,000 mi
- Electrical system18.3% of complaints · median 32,000 mi
- Fuel system12.6% of complaints · median 58,000 mi
Documented problems
- Transmission — Multitronic CVT2002–2005
- Engine — 1.8T Oil Sludge2002–2005
Owners filed 804 complaints with NHTSA about the 2002–2005 Audi A4; the exterior lighting leads with 19.3% of them, and half of the 627 that record an odometer reading came by 57,000 miles. A count like this can’t rate reliability on its own: NHTSA records what owners chose to report, not how many of each car were sold.
Failures are spread across the mileage range, with the middle half between 35,000 and 83,000 miles.
Before-you-buy checklist ↓At your mileage ↓Check this VIN — NHTSA ↗
How many miles does a 2002–2005 Audi A4 last?
Complaint records can’t measure how long a car lasts; they show when reported failures happened. On the 2002–2005 Audi A4, half of the 627 complaints that record an odometer reading were filed by 57,000 miles and 90% by 112,000 miles.
21 reports came in past 150,000 miles and 4 past 200,000 — each one proof that an A4 reached that mileage, not that it failed there.
Figure 1 · Audi A4 2002–2005 · 627 reports with mileage
Mileage at failure
Complaints per 10,000-mile bin, 0 to 200,000 miles, equal bins on a linear scale. Tallest bar = 85 complaints.
- Rest of the range
- Median
- 200,000+ — 4 complaints (0.6%), plotted separately
- 10%
- 9,500
- 25%
- 35,000
- Median
- 56,600
- 75%
- 83,000
- 90%
- 112,000
Show the numbers
| Mileage | Complaints | Share |
|---|---|---|
| 0–10,000 | 66 | 10.5% |
| 10,000–20,000 | 33 | 5.3% |
| 20,000–30,000 | 38 | 6.1% |
| 30,000–40,000 | 41 | 6.5% |
| 40,000–50,000 | 70 | 11.2% |
| 50,000–60,000 | 85 | 13.6% |
| 60,000–70,000 | 65 | 10.4% |
| 70,000–80,000 | 52 | 8.3% |
| 80,000–90,000 | 44 | 7.0% |
| 90,000–100,000 | 32 | 5.1% |
| 100,000–110,000 | 30 | 4.8% |
| 110,000–120,000 | 23 | 3.7% |
| 120,000–130,000 | 8 | 1.3% |
| 130,000–140,000 | 9 | 1.4% |
| 140,000–150,000 | 10 | 1.6% |
| 150,000–160,000 | 10 | 1.6% |
| 160,000–170,000 | 2 | 0.3% |
| 170,000–180,000 | 2 | 0.3% |
| 180,000–190,000 | 1 | 0.2% |
| 190,000–200,000 | 2 | 0.3% |
| 200,000+ | 4 | 0.6% |
Source: NHTSA Office of Defects Investigation, public domain. Complaint counts reflect what owners reported and are not a measure of failure rate per vehicle sold.
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.
Common A4 problems, and when they happen
Figure 2 · Audi A4 2002–2005
When each system fails
Bar spans the middle half of reports; the notch inside each bar is the median. Miles at failure on a proportional scale — equal distances are equal ratios, not equal miles.
- Electrical system147 reports32,00011,000–69,000Electrical system: 147 reports, median 32,000 miles, middle half 11,000 to 69,000 miles.
- Engine and its cooling system71 reports52,00026,000–70,000Engine and its cooling system: 71 reports, median 52,000 miles, middle half 26,000 to 70,000 miles.
- Fuel system101 reports58,00043,000–72,000Fuel system: 101 reports, median 58,000 miles, middle half 43,000 to 72,000 miles.
- Throttle and speed control50 reports62,00035,000–95,000Throttle and speed control: 50 reports, median 62,000 miles, middle half 35,000 to 95,000 miles.
- Exterior lighting155 reports65,00050,000–92,000Exterior lighting: 155 reports, median 65,000 miles, middle half 50,000 to 92,000 miles.
- Airbag system100 reports70,00049,000–113,000Airbag system: 100 reports, median 70,000 miles, middle half 49,000 to 113,000 miles.
- Transmission and driveline88 reports71,00040,000–97,000Transmission and driveline: 88 reports, median 71,000 miles, middle half 40,000 to 97,000 miles.
- Your odometer — appears after you enter it in “Where your car sits”
Ordered by median mileage, earliest first. The first 12,000 miles are shaded: that is the boundary this site uses between a manufacturing defect and ordinary wear, not a property of the world.
Source: NHTSA Office of Defects Investigation, public domain.
All systems in a table
| System | Complaints | Share | Median | 25–75% |
|---|---|---|---|---|
| Exterior lighting | 155 | 19.3% | 65,000 | 50,000–92,000 |
| Electrical system | 147 | 18.3% | 32,000 | 11,000–69,000 |
| Fuel system | 101 | 12.6% | 58,000 | 43,000–72,000 |
| Airbag system | 100 | 12.4% | 70,000 | 49,000–113,000 |
| Transmission and driveline | 88 | 10.9% | 71,000 | 40,000–97,000 |
| Engine and its cooling system | 71 | 8.8% | 52,000 | 26,000–70,000 |
| Throttle and speed control | 50 | 6.2% | 62,000 | 35,000–95,000 |
| Visibility equipment | 50 | 6.2% | 48,000 | 20,000–65,000 |
| Tyres | 32 | 4.0% | 25,000 | 3,000–60,000 |
| Engine | 30 | 3.7% | 116,000 | 104,000–150,000 |
System by system, in words
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 19.3% 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 50,000 and 92,000 miles.
The electrical system accounts for 18.3% of complaints (147 reports, 97 of them with a mileage figure), and it fails early — a median of 32,000 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 11,000 and 69,000 miles.
The fuel system accounts for 12.6% of complaints (101 reports, 96 of them with a mileage figure), with a median of 58,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 43,000 and 72,000 miles.
The airbag system accounts for 12.4% of complaints (100 reports, 52 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 49,000 and 113,000 miles.
The transmission and driveline accounts for 10.9% 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 40,000 and 97,000 miles.
The engine and its cooling system accounts for 8.8% of complaints (71 reports, 60 of them with a mileage figure), with a median of 52,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 26,000 and 70,000 miles.
Known problems with the 2002–2005 A4
Transmission — Multitronic CVT 2002–2005
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
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.
Before you buy a 2002–2005 A4: the 3-minute check
Generated from 627 mileage-tagged complaints, 7 recall campaigns, 2 documented problem areas. Print this page — the checklist survives print.
- Run the VIN at nhtsa.gov/recalls. 7 campaigns cover this generation; an open recall is a free repair you can make the seller's problem.
- Check transmission — multitronic CVT on 2002–2005 (FWD multitronic–equipped cars) 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…
- Check engine — 1.8T oil sludge on 2002–2005 (1.8T only) cars. 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.
- End with a pre-purchase inspection of this car. Aggregate data describes the population; the example in front of you has its own history.
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 35,000 and 83,000 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 32,000, 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.
A4 problems by mileage: where your car sits
Type your odometer reading, or read the common mileages in the table. Your marker lands on the timing chart above and on the curve below.
| System | Middle half of reports, mi | At 60k mi53% below | At 90k mi79% below | At 120k mi92% below | At 150k mi97% below | At 200k mi99% below |
|---|---|---|---|---|---|---|
| Exterior lighting | 50,000–92,000 | in window | in window | earlier | earlier | earlier |
| Electrical system | 11,000–69,000 | in window | earlier | earlier | earlier | earlier |
| Fuel system | 43,000–72,000 | in window | earlier | earlier | earlier | earlier |
| Airbag system | 49,000–113,000 | in window | in window | earlier | earlier | earlier |
| Transmission and driveline | 40,000–97,000 | in window | in window | earlier | earlier | earlier |
| Engine and its cooling system | 26,000–70,000 | in window | earlier | earlier | earlier | earlier |
| Throttle and speed control | 35,000–95,000 | in window | in window | earlier | earlier | earlier |
Figure 3 · Audi A4 2002–2005 · 627 reports with mileage
Share of reports below each mileage
Share of mileage-tagged reports filed at or below each odometer reading. Steps rise only at bin edges, by exact counted shares.
- 60,000 mi — 53% of reports below
- 90,000 mi — 79% of reports below
- 120,000 mi — 92% of reports below
- 150,000 mi — 97% of reports below
- 200,000 mi — 99% of reports below
- Median — the staircase crosses the 50% line here
- Your odometer — appears after you enter it above
The staircase tops out at 99%: the remaining 0.6% of reports (4) came above 200,000 miles.
Nothing is smoothed or interpolated. Linear axis, same as Figure 1.
Source: NHTSA Office of Defects Investigation, public domain.
2002–2005 Audi A4 recalls (7)
NHTSA records 7 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), the fuel system (2), the exterior lighting (1). Several campaigns against one area can mean a remedy that did not hold, or separate defects in parts filed under the same heading; the summaries below name each defect.
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.
Jun 2021 · 2002 · Air BagsIn the event of a crash necessitating air bag deployment, the air bag may not properly protect the occupant…
The defect. Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2000-2001 Audi TT Coupe, TT Roadster, 2000-2002 A4, and S4 vehicles equipped with Non-Azide Driver Air Bag Inflators (NADI) that do not contain phase stabilized ammonium nitrate (PSAN)…
What can happen. In the event of a crash necessitating air bag deployment, the air bag may not properly protect the occupant, increasing the risk of serious injury or death.
The free fix. Dealers will replace the driver frontal airbag inflator with an alternative inflator, free of charge. Owner notification letters were mailed November 2, 2021. Owners may contact Audi customer service…
Jun 2018 · 2005 · Air BagsAn inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in…
The defect. Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2005-2008 Audi A4 Sedan, A4 Avant, S4 Avant and S4 Sedan, 2007-2008 RS4 Sedan, 2004 RS4 Cabriolet, 2007-2009 A4 Cabriolet and S4 Cabriolet, 2005-2011 A6 Sedan, 2006-2011 A6 Avant, and…
What can happen. An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
The free fix. Audi has notified owners, and dealers will replace the passenger frontal air bag with an alternate remedy part, free of charge. The recall began June 29, 2018. Owners may contact Audi customer…
Jan 2017 · 2005 · Air BagsAn inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury…
The defect. Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2009 Audi A4 Cabriolet, S4 Cabriolet, A6 Avant, A6 Sedan and S6 Sedan vehicles originally sold, or ever registered, in Arizona, Arkansas, Delaware, the District of Columbia, Illinois…
What can happen. An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
The free fix. Audi will notify owners, and dealers will replace the passenger frontal air bag inflator, free of charge. The recall began March 30, 2018. Owners may contact Audi customer service at 1-800-253-2834.…
Jun 2016 · 2004–2005 · Air BagsAn inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury…
The defect. Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2004-2008 Audi A4, and 2005-2011 Audi A6 vehicles originally sold, or ever registered, in Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina…
What can happen. An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
The free fix. Audi will notify owners, and dealers will replace the passenger frontal air bag inflator, free of charge. Owner notification letters were mailed April 28, 2017. Owners may contact Audi customer…
Aug 2007 · 2003 · Fuel System, GasolineIf fuel flow to the engine is interrupted, the vehicle could stall without warning and thus present a…
The defect. On certain vehicles equipped with 1.8L turbo, 2.8L v6, or 3.0L engines, a change in the electrical motor components in the fuel pump can lead to an inoperative fuel pump and, ultimately, stoppage of fuel supply to the engine causing it to stall.
What can happen. If fuel flow to the engine is interrupted, the vehicle could stall without warning and thus present a potential risk of crash.
The free fix. Dealers will install new fuel pumps free of charge. The recall began on september 28, 20007. Owners may contact vw at 1-800-222-8987 or Audi at 1-800-822-2834. This recall is a supplement to a…
Jan 2006 · 2003 · Fuel System, GasolineIf fuel flow to the engine is interrupted, the vehicle could stall without warning and thus present a…
The defect. On certain vehicles produced from september 2002 - march 2003, equipped with 1.8L turbo, 2.8L v6, or 3.0L engines, a change in the electrical motor components in the fuel pump can lead to an inoperative fuel pump and, ultimately, stoppage of fuel supply to…
What can happen. If fuel flow to the engine is interrupted, the vehicle could stall without warning and thus present a potential risk of crash.
The free fix. Dealers will install new fuel pumps free of charge. The recall began on april 10, 2006. Owners may contact vw at 1-800-222-8987 or Audi at 1-800-822-2834.
Mar 2005 · 2003–2004 · Exterior LightingThis condition could affect a driver's field of view, increasing the risk of a crash.
The defect. On certain passenger vehicles, there is a possibility of xenon headlamp coating degradation over time. The luminous transmittance of the headlamp may decrease over a period of time.
What can happen. This condition could affect a driver's field of view, increasing the risk of a crash.
The free fix. Dealers will replace the left and right xenon headlamp reflectors free of charge. The recall began on april 11, 2005. Owners may contact Audi at 1-800-822-2834.
Crashes, fires and injuries owners reported
What owners reported alongside the failure itself, out of 804 complaints against this generation:
- Crashes
- 38 (4.7%)
- Fires
- 18
- Injury reports
- 23
- Fatality reports
- 0
These flags are self-reported by complainants and unverified by NHTSA; one report can carry several flags, so the counts overlap and do not sum to a total. They are not adjusted for how many of these vehicles are on the road. No chart is drawn here on purpose: overlapping counts spanning very different magnitudes cannot be honestly encoded as lengths.
A4 problems by model year
The 2005 drew the most complaints of this generation, 219, most of them about the exterior lighting, and the 2002 the fewest, 181. A typical year drew about 202.
| Year | Complaints | With mileage | Median miles | Most reported | Recalls |
|---|---|---|---|---|---|
| 2002 | 181 | 113 | 30,000 | Electrical system (76) | 1 |
| 2003 | 215 | 181 | 60,000 | Transmission and driveline (44) | 3 |
| 2004 | 189 | 168 | 60,000 | Fuel system (46) | 2 |
| 2005 | 219 | 165 | 58,000 | Exterior lighting (101) | 3 |
What A4 owners reported
The contact owns a 2003 Audi A4. The contact stated while driving 65 MPH, the vehicle decelerated, lost motive power and stalled without warning. The contact stated that the vehicle failed to restart and there was steam coming from the vehicle. The vehicle was towed to the residence where an independent mechanic…
2003 · 100,000 miles · Engine and its cooling system
The contact owns a 2003 Audi A4. The contact stated that while driving at an undisclosed speed, a fuel odor was detected. The contact parked the vehicle and noticed there was fuel leaking on the rear driver's side. The vehicle was taken to the dealer and diagnosed that the fuel pump flange and hoses needed to be…
2003 · 144,000 miles · Fuel system
I originally had 3 recalls on my vehicle i called in to see about getting them fixed free of charge as explained in the recall tech bulletin .The customer service representative proceeded in getting all of my information then after doing so tells me there are no recalls on my vehicle and proceeded to update my cars…
2004 · 157,000 miles · Airbag system
Noticed air bag lights on didnt think quick , also i notuced electrical issue here & there. Engine runs & sounds louder when using a/c. When you go to shut off vehicle theres a loud thump thump noise at the end fir about 3 mins or so , problems starting the engine , back windshield wiper turns on by its self , a week…
2005 · 175,000 miles · Airbag system
Built from 627 NHTSA complaints with mileage · snapshot 2026-09-26 · open data · how it is built
Other A4 generations
- A4 1996–2001 403 reports with mileage, most about the hydraulic brake circuit
- A4 2006–2008 345 reports with mileage, most about the airbag system
- A4 2009–2016 361 reports with mileage, most about the engine