The 1999 Audi A6 has no open NHTSA recalls. Owners report 8 recurring issue clusters, led by “ABS control module failure.” Audi follows the VW Group Longlife service rhythm: oil and minor service every 10,000 miles or 12 months, whichever comes first, using oil that meets VW 502 00 / 504 00 (or 508 00 for newer 0W-20 engines) — generic synthetic does not qualify. S tronic dual-clutch gearboxes need fluid service every 40,000 miles despite 'lifetime fill' claims. Fully electric models (e-tron, e-tron GT) skip oil service entirely but keep brake-fluid, cabin-filter, and coolant-circuit intervals.
No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.
What drivers and federal regulators have officially reported about the 1999 Audi A6.
SERVICE BRAKES, HYDRAULIC
20 NHTSA complaints · 2000-06 → 2012-01
“I HAD A FULL LOSS OF MY ABS BRAKES ON ICY WINTER ROADS. I EVENTUALLY SLID OFF THE ROAD AND HIT A FENCE”
“AUDI DEALER RAN DIAGNOSTIC TEST AND DETERMINED THAT ABS CONTROL MODULE NEEDS TO BE REPLACED”
“THE ABS FAILED WHICH CAUSED THE CAR TO SPIN OUT OF CONTROL”
FUEL SYSTEM, GASOLINE
18 NHTSA complaints · 1999-12 → 2004-09
“SINCE PURCHASE OF VEHICLE HAS NOTICED FUEL GAUGE NOT WORKING PROPERLY. IT READS FULL EVEN WHEN TANK IS EMPTY”
“RECALL 00V137 WAS COMPLETED, HOWEVER 4 MONTHS LATER THE FUEL SENDING UNITS FAILED AGAIN, THE VEHICLE HAS HAD 6 ATTEMPTS TO CORRECT THE PROBLEM, THE CONSUMER RAN OUT OF GAS ONCE ON A FREEWAY BECAUSE OF THE FAULTY FUEL GAUGE”
“FUEL LEVEL SENDING UNIT INACCURATELY READS THE AMOUNT OF FUEL IN THE VEHICLE”
STEERING
5 NHTSA complaints · 2004-09 → 2005-08
“I WENT TO THE DEALER FOR A SERVICE BULLETIN I RECEIVED AND THEY TOLD ME MY TIE RODS WERE WORN OUT”
“THE CONSUMER'S VEHICLE HAD WORN OUT TIE RODS THAT NEEDED REPLACEMENT”
“DEALERSHIP WOULD NOT REPAIR FREE OF CHARGE BECAUSE THE VIN WAS NOT INCLUDED”
SUSPENSION
6 NHTSA complaints · 2002-07 → 2007-08
“RIGHT FRONT WHEEL ASSEMBLY ON RIGHT SIDE OF CAR SEPARATEDFROM CAR. THE UPPER CONTROL ARM BROKE CAUSING THE ASSEMBLY TO FALL OFF THE CAR”
“CONTROL ARM BEARINGS OF THE FRONT SUSPENSION ON MY AUDI A6 2.8 QUATTRO WAGON (MY 1999) SHOW EXCESSIVE WEAR AFTER ~80,000 MLS”
“I RECENTLY STARTED TO HEAR A CLUNKING NOISE IN THE FRONTEND. DURING AN OIL CHANGE THE AUDI DEALER TOLD ME THAT MY CONTROL ARM BUSHINGS WERE GOING BAD”
ELECTRICAL SYSTEM
6 NHTSA complaints · 2003-02 → 2008-02
“THE CENTRAL DASH CLUSTER, DRIVERS INFORMATION DISPLAY FADES TO ILLEGIBLE AFTER A FEW MINUTES OF OPERATION”
“INSTRUMENT PANEL IS FADED TO UNREADABLE”
“CENTER DISPLAY FADED OUT AT 55000 MILES AND NEEDED TO BE REPLACED FOR $900”
VEHICLE SPEED CONTROL
22 NHTSA complaints · 2003-01 → 2015-01
“THE THROTTLE STUCK ON MY '99 AUDI A6 2.8 QUATTRO AT 70 MPH ON INTERSTATE I-65 IN INDIANAPOLIS, IN. IT TOOK BOTH FEET ON THE BRAKE TO STOP THE VEHICLE AND STILL ALMOST HIT SOMEONE IN THE REAR (SCARY)”
“ON A BELOW ZERO DAY THE THROTTLE ON MY 1999 AUDI A6 QUATTRO WAS FULLY ENGAGED AFTER LIFTING OFF THE PEDAL”
“THROTTLE STUCK. IT HAPPENED DURING SUB ZERO WEATHER WHILE CONSUMER WAS DRIVING ABOUT 70 MPH ON A HIGHWAY”
ELECTRICAL SYSTEM
15 NHTSA complaints · 2003-01 → 2013-03
“WHILE DRIVING MY 1999 AUDI A6 ON THE EXPRESSWAY WITH MY 3 YEAR OLD SON IN HIS BOOSTER SEAT, THE DRIVER SIDE OF THE DASHBOARD STARTS TO SMOKE . THEN IN LESS THAN A MINUTE FLAMES WERE COMING OUT”
“SMOKE ERUPTED THROUGH VENT SYSTEM. PULLED CAR TO SIDE OF ROAD AND FAMILY OF 4 EVACUATED”
“WHILE DRIVING SMOKE BEGAN COMING OUT OF THE AC VENTS THEN FLAME STARTING COMING OUT OF THE DRIVER'S SIDE VENTS”
STEERING
10 NHTSA complaints · 2002-12 → 2010-02
“THE HEATED STEERING WHEEL BECAME TOO HOT WHILE BEING USED AND BEGAN TO SMOKE”
“HEATED STEERING WHEEL EXTREMELY HOT CAUSING THE STEERING WHEEL TO GET WARP AND MELT”
“HEATED STEERING WHEEL BURNS HANDS, SMOKES”
Issues on other model years
Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.
We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.
Critical for safety and preventing major damage
Replace oil and filter every 10,000 miles or 12 months with VW 502 00 / 504 00 / 508 00 spec oil. S and RS models driven hard: many owners shorten to 5,000-7,500 miles. Wrong-spec oil is the leading cause of TFSI timing-chain tensioner and PCV problems.
Estimated cost — typical U.S. ranges
Dealer
~$120–$160
Shop
~$85–$115
DIY
~$25–$55
Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.
Rotate every 10,000 miles with the oil service. quattro models: keep all four tires within 4/32" of each other — mismatched wear stresses the center differential.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Often free at the shop where you bought the tires — worth asking before paying.
Inspect pads, rotors, and wear sensors every 10,000 miles. Audi uses electronic pad-wear sensors on most models — replace the sensor with the pads.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.
Replace DOT 4 brake fluid every 2 years regardless of mileage — Audi's published schedule is time-based because the fluid absorbs moisture.
Estimated cost — typical U.S. ranges
Dealer
~$180–$200
Shop
~$125–$140
DIY
~$10–$25
DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.
S tronic (DSG) gearboxes on A3/S3/RS 3, Q3, TT, and many A5/Q5 models: replace fluid and filter every 40,000 miles with the VW Group-spec fluid for your gearbox code. Skipping this service is the most common cause of mechatronic failure.
Estimated cost — typical U.S. ranges
Dealer
~$470–$640
Shop
~$330–$450
DIY
Pro only
VW/Audi DSG service needs a fluid-fill procedure at a specific temperature — shop equipment territory.
Keeps your vehicle running smoothly and efficiently
A3/S3/RS 3, Q3, and TT use a Haldex-style rear coupling: replace its fluid roughly every 40,000 miles (some model years specify sooner — check your manual). Longitudinal quattro (A5-A8, Q5, Q8) has no coupling service; see differential fluid instead.
Estimated cost — typical U.S. ranges
Dealer
~$220–$290
Shop
~$155–$205
DIY
~$40–$90
VW/Audi/Volvo AWD coupling — specific fluid required. Filter usually swapped at the same time.
TFSI turbo engines: new plugs every 40,000 miles. RS models with the 2.5 TFSI five-cylinder: consider 30,000 miles under track or hard street use.
Estimated cost — typical U.S. ranges
Dealer
~$285–$390
Shop
~$200–$275
DIY
~$25–$100
Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.
Replace every 40,000 miles; inspect at 20,000 on turbocharged engines — a clogged filter shows up as sluggish boost response first.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
5-minute job on most cars; the airbox lid usually has clips, no tools needed.
2.0 TFSI (EA888) engines before roughly 2013 had timing-chain tensioner failures — have the tensioner revision checked by 80,000 miles on earlier cars. Later engines carry the updated design with no scheduled service.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Pro only
Timing chains are normally lifetime. Listen for rattle on cold start — that's the actionable signal. Replacement is major work, quote separately.
Extends the life of your vehicle and improves comfort
Q5, Q8, and A5-A8 quattro: independent Audi specialists recommend front/rear differential fluid service around 60,000 miles even where Audi lists it as lifetime fill.
Estimated cost — typical U.S. ranges
Dealer
~$150–$195
Shop
~$105–$135
DIY
~$20–$50
Drain plug + fill plug — straightforward DIY. AWD vehicles have two; budget for both.
Replace the cabin air filter every 20,000 miles or 2 years. Audi specifies an activated-carbon filter on most models.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.
Audi coolant is labeled lifetime fill. Independent VW/Audi specialists recommend a refresh around 5 years or 100,000 miles to protect the water pump and thermostat housing — and only with the correct pink/lilac VW Group coolant.
Estimated cost — typical U.S. ranges
Dealer
~$285–$330
Shop
~$200–$235
DIY
~$25–$60
Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.
Occupant deaths in fatal crashes (FARS)
30 crashes 1990–2024
How the 30 occupant deaths break down
21
driver deaths
9
passenger deaths
30
occupant deaths
Crash years covered: 1990–2024 This model year first appears in 1999 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.
FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number
FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.
Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.
Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.
IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.
Owner-reported problem signals
Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.
12
complaints mentioning a crash
23
complaints mentioning a fire
Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.
How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.
This maintenance schedule for the 1999 Audi A6 reflects Audi's published service intervals and the Audi Service Interval Display system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.