NHTSA lists 10 safety recalls and 130 owner complaints for the 1998 Audi A6. Most complaints involve fuel system, gasoline (29) and vehicle speed control (18). The EPA rates it 18–19 mpg combined.
Volkswagen Group of America, Inc. (VW) is recalling certain 2000-2001 TT Roadster, 2000 TT Coupe, 1999 Audi A8, 1998-2000 Audi A6, and 1999-2000 Audi A4 vehicles equipped with Non-Azide Driver air bag Inflators (NADI) that do not contain phase stabilized ammonium nitrate (PSAN) propellant. Due to a manufacturing issue, the NADI inflators may absorb moisture, possibly causing the air bag to deploy improperly in the event of a crash.
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH HALOGEN LOW BEAM HEADLIGHTS, CERTAIN CONNECTOR PINS IN THE HEADLIGHT SWITCH CONNECTOR COME INTO CONTACT WITH EACH OTHER CAUSING A SHORT CIRCUIT. NOTE: VEHICLES WITH XENON LOW BEAM HEADLIGHTS ARE NOT AFFECTED BECAUSE THE CIRCUIT IN THESE VEHICLES CONTAINS A FUSE, WHICH PRECLUDES EXCESSIVE CURRENT FLOW IN THE CASE OF A SHORT CIRCUIT. AUDI S6 AND S6 AVANT VEHICLES ARE ALL EQUIPPED WITH XENON LOW BEAM HEADLIGHTS AND, THEREFORE, ARE NOT LONGER AFFECTED BY THIS RECALL.
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH 2.8L, V6 5-VALVE ENGINES, AND AUTOMATIC TRANSMISSIONS, WHILE DRIVING DURING EXTREMELY LOW AMBIENT TEMPERATURES THE THROTTLE MAY FREEZE IN AN OPEN POSITION DUE TO ICE ACCUMULATING IN THE THROTTLE BODY.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Complaints for each A6 model year we’ve synced.
| Model year | NHTSA complaints |
|---|---|
| 1996 | 54 |
| 1997 | 21 |
| 1998 | 130 |
| 1999 | 217 |
| 2000 | 148 |
| 2001 | 113 |
| 2002 | 103 |
| 2003 | 71 |
| 2004 | 35 |
| 2006 | 67 |
| 2007 | 53 |
| 2008 | 71 |
| 2009 | 21 |
| 2010 | 17 |
| 2011 | 21 |
| 2012 | 60 |
| 2013 | 52 |
| 2014 | 41 |
| 2015 | 22 |
| 2016 | 51 |
| 2017 | 20 |
| 2018 | 2 |
| 2026 | 9 |
“I AM EXPERIENCING AN ISSUE WITH MY VEHICLE THAT WAS RECALLED BY THE FACTORY AUDI AG BUT MY VEHICLE WAS NOT LISTED AS ONE OF THE RECALLED VEHICLE. I AM AFRAID OF GETTING STRANDED DUE TO AN IMPROPER FUEL READING. PLEASE ADDRESS THIS ACCORDINGLY, THANK YOU. *TR”
“TL*- THE CONTACT OWNS A 1998 AUDI A6. THERE RECALL 04V495000 IN OCTOBER 2004 CONCERNING VEHICLE SPEED CONTROL. ON 3/08/07 THE CONTACT WAS DRIVING AT 65 MPH AND WITHOUT WARNING THE VEHICLE ACCELERATED TO 90 MPH. THE CONTACT WAS UNABLE TO REDUCE THE SPEED, ENGAGE THE BRAKES OR PLACE THE VEHICLE IN NEUTRAL. THE CONTACT HAD TO FORCE THE VEHICLE IN PARK WITH THE TRANSMISSION GRINDING AND TURNED THE ENGINE OFF. THE VEHICLE WAS TOWED TO THE DEALER, AND THEY STATED THAT THE VEHICLE HAS BEEN SERVICED FOR EVERY RECALL. ROAD CONDITIONS WERE NOT A FACTOR. AUDI AND THE DEALER STATED THAT THE RECALL REPAIR WAS PERFORMED ON THE VEHICLE. THE CONTACT DIDN'T AGREE THAT THE REPAIRS WERE PERFORMED DUE TO THE FAILURE SHE EXPERIENCED. AUDI ASSURED THE CONTACT THAT PRIOR TO PURCHASING THE VEHICLE ALL RELATED RECALL REPAIRS WERE PERFORMED. THE CURRENT AND FAILURE MILEAGE WERE BOTH 100,000. *AK”
“DEAR DOT, I'VE A 1998 AUDI A6 QUATTRO. MY ABS SYSTEM SHOWS WARNING YELLOW ABS LIGHT AND RED FLASHING BRAKE LIGHT AT ALL TIME. I'VE TAKEN MY TWO SHOPS AND THEY BOTH INDICATED THAT THE ABS UNIT IS DEFECTIVE AND NEEDS REPLACEMENT. THEY TESTED ALL 4 WHEEL SENSORS ON THE CAR AND ALSO MAPPED OUT THE ELECTRICAL SYSTEM. THE CONCLUSION WAS A DEFECTIVE ABS UNIT. I'VE DONE SOME RESEARCH AND OTHER AUDI OWNER FROM 1998 - 2001 ALSO HAVE THE SAME ISSUES. IF THIS SYSTEM IS KNOWN TO BE DEFECTIVE, IT SHOULD BE RECALLED IN ALL FAIRNESS. I AM PRETTY HAPPY WITH THIS CAR, BUT THE ABS IS AN UNCOMFORTABLE EXPERIENCE. IT COST ABOUT $2000 TO REPLACE THE ABS UNIT AND AUDI DOES NOT WANT TO ADMIT THE PROBLEM. REFERENCES: HTTP://AUDI-VW-ABS-RECALL.BLOGSPOT.COM HTTP://WWW.ALLWORLDAUTO.COM/COMMENTS/AUDI_A4_AVANT_COMMENTS_AND_COMPLAINTS_65-34245-1.HTML”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| A6 Auto 5-spd, 6 cyl, 2.8 L · Front-Wheel Drive | 16 | 25 | 19 | $4,050 | 468 |
| A6 Wagon quattro Auto 4-spd, 6 cyl, 2.8 L · 4-Wheel or All-Wheel Drive | 17 | 22 | 19 | $4,050 | 468 |
| A6 quattro Auto 5-spd, 6 cyl, 2.8 L · 4-Wheel or All-Wheel Drive | 15 | 24 | 18 | $4,300 | 494 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
10 safety recalls as of Nov 11, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 130 complaints with NHTSA. The most-cited components are fuel system, gasoline (29), vehicle speed control (18), service brakes, hydraulic (17). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 1998 Audi A6 at 18–19 mpg combined, depending on engine and drivetrain (3 versions rated).