1998 Audi A6 problems & reliability
130 owner complaints filed with NHTSA for the 1998 Audi A6, alongside 5 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
3 complaints report injuries (4 injured).
Federal crash records (FARS 2020–2023): 1998 Audi A6 vehicles were involved in 1 fatal crash with 1 occupant death. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Fuel System, Gasoline | 29 | 22% |
| Vehicle Speed Control | 18 | 14% |
| Service Brakes, Hydraulic | 17 | 13% |
| Steering | 13 | 10% |
| Suspension | 11 | 8% |
| Structure | 9 | 7% |
| Electrical System | 8 | 6% |
| Engine and Engine Cooling | 6 | 5% |
| Fuel System, Other | 6 | 5% |
| Visibility | 5 | 4% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 79,000 miles (middle 50% between 54,000 and 100,000 miles), based on 47 complaints that included mileage.
Complaints by incident year
What owners report
“Takata recall. The contact owns a 1998 Audi A6. The contact received notification of NHTSA campaign number: 20V056000 (Air Bags) however, the part to do the recall repair was not yet available. The vehicle was taken to the local dealer who stated the parts were not available. The contact stated that the manufacturer…”
Air Bags · filed Aug 6, 2021
“Fuel was found leaking from the rollover valve nipple on the fuel tank. This nipple has been known to crack when the metal ventilation line line adds stress to the plastic nipple. Gasoline was found in a puddle on the floor at the left/ rear of the car. Audi has recalled and repaired this defect on later year a6s but…”
Fuel/propulsion System · filed Sep 15, 2020
“Tl* the contact owns a 1998 audi a6. The contact stated that the vehicle caught on fire. The vehicle was taken to the dealer where it was found that the dashboard wires had failed. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage and vin was not available. *tr”
Electrical System · filed Mar 12, 2014
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- DRIVER'S SIDE DASH FIRE
Recall Query RQ06003 · opened Feb 27, 2006 · closed Jul 20, 2006 · led to recall 06V198000
- STUCK-OPEN THROTTLE
Engineering Analysis EA04017 · opened Jun 30, 2004 · closed Feb 10, 2005 · led to recall 04V495000
- STUCK-OPEN THROTTLE
Preliminary Evaluation PE04023 · opened Mar 5, 2004 · closed Jun 30, 2004
- STEERING WHEEL HEATER OVERHEATS
Preliminary Evaluation PE03019 · opened May 15, 2003 · closed Sep 17, 2003
- BRAKE AND CLUTCH PEDAL BRACKET
Preliminary Evaluation PE02008 · opened Jan 23, 2002 · closed Jul 12, 2002
- FUEL EXPULSION
Preliminary Evaluation PE99001 · opened Jan 1, 1999 · closed Mar 24, 1999 · led to recall 99V058000
Technical service bulletins
80 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1998 Audi A6. The 10 most recent:
This communication is issued to inform dealers of updated shipping regulations related to lithium ion batteries.
AWC 19-05 · Service Bulletin/Repair Instructions · issued Aug 28, 2019
This communication is issued to remind dealers of the repair validation process for repair group 19. 2005-2019 A3, 1996-2019 A4, 2008-2019 A5, 1992-2019 A6, 2012-2019 A7, 1997-2019 A8, 2019 E-Tron, 2015-2019 Q3…
AWC 19-04 · Service Bulletin/Repair Instructions · issued Jul 22, 2019
This informational bulletin contains technical information for when there is condensation visible on the inside of the headlight, taillight, fog light, side marker light, front turn signal, daytime running lights…
A941791 2012749- · Service Bulletin/Repair Instructions · issued Jul 31, 2017
This special notice is to inform dealers to return all part numbers listed in the document and order the superseded part numbers going forward.
SM 44-2017 EN · Service Bulletin/Repair Instructions · issued Jun 28, 2017
This informational bulletin contains all the the Audi Oil Quality Standards that should be used when doing an oil change.
A171782 2010043- · Service Bulletin/Repair Instructions · issued May 10, 2017
Due to increasing requests for high voltage personal protective equipment (HVE PPE) for dealer technicians working with high voltage vehicles (Hybrid, Plugin Hybrid, Electric Vehicle), the Volkswagen Tools and Equipment…
ATE-17-05 · Service Bulletin/Repair Instructions · issued Mar 3, 2017
This information TSB provides information regarding the correct way to torque adjust a wheel bolt.
A441662 2010334- · Service Bulletin/Repair Instructions · issued Oct 19, 2016
Vehicle will not communicate with diagnostic scan tool or emissions test equipment. Customers may have issues with vehicle passing state IM emissions test programs because the scan tool cannot communicate with the…
A451510 2042048- · Service Bulletin/Repair Instructions · issued Oct 5, 2015
Supersedes Technical Service Bulletin Group 19 number 15-61 dated July 7, 2015. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++…
A191562 2025303- · Service Bulletin/Repair Instructions · issued Sep 8, 2015
Supersedes Technical Service Bulletin Group 19 number 14-50 dated June 20, 2014. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++…
A1915612025303-5 · Service Bulletin/Repair Instructions · issued Jul 7, 2015
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 1998 Audi A6 has 5 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1998 Audi A6?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 79,000 miles — budget accordingly if the car is approaching that mileage.