NHTSA lists 9 safety recalls and 217 owner complaints for the 1999 Audi A6. Most complaints involve electrical system (37) and service brakes, hydraulic (31). 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 |
“TAKATA RECALL I'VE HAD TO REPLACE A WHEEL BEARING AND AXEL 2X @ $550 EACH TIME. CAR WOULDN'T ALIGN RIGHT, SO I REPLACED THE TIRES SEVERAL TIMES DUE TO THE WEARING ON ONE SIDE. THE CALIPERS WON'T COME OFF WHEN CHANGING THE BRAKES AND ROTORS. THE AUTOMATIC WINDOWS WOULD RANDOMLY ROLL DOWN SOMETIMES AFTER IT WOULD RAIN, AND WOULDN'T ROLL BACK UP FOR SEVERAL DAYS. I FIXED THE TURN SIGNAL AND CRUISE CONTROL, BUT THE PROBLEMS WITH THOSE RETURNED AFTER A COUPLE WEEKS, AND WHILE I WAS DRIVING THE UNDER COVER/PROTECTOR PLASTIC BROKE OFF ALL OVER THE ROAD BECAUSE THE AUDI DEALERSHIP APPARENTLY FORGOT TO PUT IT BACK ON PROPERLY. THIS POSSIBLY ALLOWED FOR THE OIL PAN TO HIT THE GROUND AND CRACK, WHICH A SUSPENSION PROBLEM WAS CLEARLY PART OF THAT PROBLEM TOO. I TOOK IT IN TO SEE ABOUT A CRACK IN THE OIL PAN. THEY COULDN'T FIND IT, BUT SHORTLY THEREAFTER, I DROVE TO THE MOVIE STORE AND WHEN I GOT BACK TO MY CAR, IT WAS NO LONGER RUNNING. A PUDDLE OF OIL WAS SPILLING OUT OF IT, AND THE THE ENGINE WAS SHOT. I HAD THE CAR FOR ABOUT 2 YEARS. I'M GUESSING THAT THE PROBLEMS STEMMED FROM THE WHAT THE CAR WAS RECALLED FOR.”
“MY 1999 AUDI A6 2.8 HAS ABS CONTROL MODULE FAILURE. THIS APPEARS TO BE A COMMON PROBLEM AMONG 1996 TO 2001 AUDI'S AND VW'S LACK OF ANTI-LOCK BRAKING SYSTEM CONTROL MAKES MY VEHICLE UNSAFE. AUDI IS NOT WILLING TO CORRECT THIS PROBLEM. THIS PROBLEM AFFECTS A LARGE NUMBER OF VEHICLES.”
“WHEN FILLING THE GAS TANK IN MY 99 AUDI A6 QUATTRO PRESSURE BUILDS INSIDE THE TANK AND SPRAYS BACK AT ME. THIS HAS HAPPENED EACH TIME I PUT GAS IN IT FULL OR NOT. A RECALL WAS MADE BUT, NOT FOR MY VIN. I SPOKE WITH A AUDI REP. AND A DEALERSHIP AND THEY SAID THERE'S NOTHING THAT CAN BE DONE UNLESS I PAY FOR IT. I WOULD BUT, THERE IS ALREADY A RECALL MADE FOR THAT CAR JUST NOT THAT VIN. IT'S A HAZARD AND I'VE HAD OTHER PROBLEMS THAT I PAID FOR. PLEASE LET ME KNOW IF ANYTHING CAN BE DONE. THANK YOU FOR YOUR TIME! *NM”
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 | $4,200 | 468 |
| A6 Avant quattro Auto 5-spd, 6 cyl, 2.8 L · 4-Wheel or All-Wheel Drive | 15 | 24 | 18 | $4,400 | 494 |
| A6 quattro Auto 5-spd, 6 cyl, 2.8 L · 4-Wheel or All-Wheel Drive | 15 | 24 | 18 | $4,400 | 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 |
9 safety recalls as of Oct 28, 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 217 complaints with NHTSA. The most-cited components are electrical system (37), service brakes, hydraulic (31), fuel system, gasoline (25). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 1999 Audi A6 at 18–19 mpg combined, depending on engine and drivetrain (3 versions rated).