10.0

really awful
Crashes / Fires:
2 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
116,905 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

1999 Audi A6 engine problems

engine problem

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1999 Audi A6 Owner Comments

problem #14

Jan 232015

A6 6-cyl

  • 167,770 miles

A D V E R T I S E M E N T S

While driving 60 mph on the freeway, the car accelerated on its own to 72 mph as if going into cruise control. Confirmed the cruise control switch was turned off. Applied the brakes seven times. Car did not respond to braking. Engine seemed to race against the brakes. I put the car in neutral, moved to side of the road. Applied the hand brake. Turned key off. Car slowed then stopped. Since this incident the car was test driven twice by mechanics, during which it seemed to operate normally. On January 27, 2015 the car was taken to the local dealer, bellevue Audi, for diagnosis. Awaiting results.

- Sammamish, WA, USA

problem #13

Apr 222011

A6

  • 184,700 miles
1999 Audi A6 quattro suddenly accelerated. I was pulling into a parking slot at maybe 5 mph, my foot was lightly pressing on the brake pedal, as I was nearly in the parking stall. The engine was at idle speed. As I coasted into the parking stall with my foot on the brake pedal the engine suddenly and without any prior warning revved up to above 3000 RPM. The car lurched forward hitting the parking curb directly in front of me. I immediately applied more pressure to the brake pedal to keep the car from jumping over the curb, and shifted the gear selector into N. the engine then revved even higher, at which point I turned off the key. With the key off, I moved the gear selector to P, and restarted the engine. The vehicle then ran idled at normal speed, and drove normally to my home about 1/4 mile away. I'm afraid to drive the vehicle. This is the second time this has happened; the first time it happened was as I was coasting to a stop at a red traffic light. Again my foot was on the brake and the engine was returning to idle speed. As I approached the intersection the engine revved causing me to coast through the intersection before being able to bring the vehicle to a full stop, again by applying strong breaking force. I then put the transmission in N and the engine revved higher, so I switched off the key. Thankfully the other vehicles had already cleared the intersection and there was no collision. When I restarted the vehicle, it idled and drove as normal again. The outside temperature was above 45 degrees Fahrenheit and the pavement was dry in both cases.

- Moscow, ID, USA

problem #12

Feb 092011

A6

  • 140,000 miles
Driving home tonight my car all of a sudden started accelerating (I drive an Audi A6 1999). Using the brakes I was able to slow it down enough to get off the freeway though my brakes seemed to be fighting against the car. I rolled through two stop signs as my car would not stop and luckily avoiding the other cars waiting there I was able to put my car in park and turn off the engine. I waited ten minutes or so and tried starting my car. The engine revved to 4 to 5000 rpms so, I quickly shut it off again. I waited again, tried it once more and the car started fine. I drove home, called the dealership and was told I could be seen on 02/14/11. Four days from now. This is the second time this has happened.

- Arden Hills, MN, USA

problem #11

Nov 202010

A6 6-cyl

  • 110,000 miles

A D V E R T I S E M E N T S

On the morning of November 20, 2010, I was pulling in to a parking space at the local library, approximately 10 minutes from my home. As I was making the turn to pull into the parking space, I heard the engine rev, and the car accelerated as though the cruise control had "kicked in" and my brake would not stop the car. Rather than hit a car that was parked in front of my parking space, I turned the vehicle to go up a curb and hit a tree. Once the tree stopped the car, I was able to put the car in reverse, back down off the curb, put the car in park, and pull out the key. Oil was pouring out of the vehicle and it had to be towed to my home, was examined by my insurance company, and was written off as a total loss.

- Broadview Heights, OH, USA

problem #10

Jul 152009

A6

  • 72,000 miles
Car: 1999 Audi avant wagon 1. the car was left outside during the winter of 2008/9 and unused for several months. In sprint of 2009, the car was jump started and this is when the problems started occurring. 2. regardless of cold weather, the car will accelerate. More specifically, when the gas pedal is released, the car will not decelerate. This means the car will propel itself forward. Without depressing the gas pedal, the car will sometimes achieve a speed of 40-45 mph. By pushing the pedal down and releasing it quickly (pumping the pedal), the throttle will release and the car will come back down to idle speed. This occurs not every time but approximate 1 out of 10 times that the car is driven. 3. the tube that leads to the throttle, the accelerator cable, and the throttle body have all been replaced. There is a recall on the throttle body on this car related to this specific issue but the recall is only based on very cold ambient weather. I am experiencing this issue during warm weather also. The mechanic now thinks this is due the electronic control module (ECM).

- Maplewood, NJ, USA

problem #9

Feb 082007

A6 6-cyl Diesel

  • Automatic transmission
  • miles
- the contact stated that the 1999 Audi A6 quattro had problems with acceleration. The vehicle accelerated on 02/05/07. The contact's wife was driving at 65 mph when the vehicle accelerated on its own. The contact stated the only way the vehicle stopped was to push the brake pedal with both feet. The contact called the dealership and had an appointment set up for today 02/12/07. It happened again on 02/09/07. While driving the vehicle, and she was at a complete stop made a right turn and slowly accelerated to 45 mph. The road surface was completely dry, the vehicle accelerated unexpectedly. The gas pedal went to the floor by itself without her pushing it to the floor. The driver applied the brakes with the right foot and the vehicle didn't stop. Then tried to pull the accelerator pedal up with the oe to stop the acceleration. She tried to pull the vehicle over to the side of the road, but the vehicle didn't decrease in speed. While trying to get the vehicle to come to a stop she then hit a tree. She hit the tree off the center of the front of the vehicle, and airbag didn't deploy, but the seat belt did restrain her. The contacts wife sustained neck and sternum injuries. And was taken to the hospital by an ambulance. There was a police report. The current mileage was 14000.

- Danville, PA, USA

problem #8

Jan 212005

A6 6-cyl

  • Automatic transmission
  • 94,000 miles

A D V E R T I S E M E N T S

I was traveling on pa route 476 southbound approximately 8:30 pm, maintaining a constant speed of approximately 65 mph. The thermometer in my car reported an ambient exterior temperature of between 4 and 8 F. the cruise control switch was in the standby position but cruise control was not activated. I began to notice that the car was maintaining speed without depressing the accelerator pedal. In fact, when traveling on level ground, the car accelerated to 80 mph until I depressed the brake pedal. The tachometer reported a constant engine speed of 2400 RPM with no pressure on the accelerator pedal. I attempted to change the engine speed by activating and deactivating cruise control, which did not respond at all. I next tapped the brakes to see if this would disengage a potential cruise control malfunction, again to no avail. The accelerator pedal was free of any obstructions and moved freely under my foot. As I approached the toll plaza, I required significant brake pressure to slow the vehicle down to approximately 15 mph. With full brake force, the vehicle would slow to approximately 5 mph but would not stop. I then put the transmission in neutral and the car stopped but the engine revved in excess of 6,000 RPM. I immediately shut the engine off. Upon restarting the car, the idle speed was normal. Thinking that the problem was icing and now resolved, I continued into philadelphia without incident. Upon my return to allentown the same night (approximately 10:30 pm), also on route 476, I experienced another episode of a stuck accelerator. I had been traveling at 65 mph for about 30 minutes when the problem recurred. The ambient temperature was 3 F and the engine speed maintained 1800 ? 2000 RPM without any accelerator pedal pressure. Again, in order to stop the car, I had to place the transmission in neutral and quickly turn off the ignition key to avoid further engine damage.

- Allentown, PA, USA

problem #7

Jul 172004

A6

  • Automatic transmission
  • miles
When stopped at a traffic light, the vehicle surged forward. The consumer was able to control the vehicle and pulled off the road. The consumer will contact the dealer about this issue.

- Holden Beach, NC, USA

problem #6

Jan 012003

A6 6-cyl

  • Automatic transmission
  • 60,000 miles
Throttle stuck. It happened during sub zero weather while consumer was driving about 70 mph on a highway. Consumer had to use both feet on the brakes to pull over. When consumer put vehicle in park it red lined. Consumer shut vehicle off, and turned it back on without any problems. Then, dealer looked it over, and said they couldn't find any problems with the vehicle.

- Burlington, NJ, USA

problem #5

Apr 292004

(reported on)

A6 4WD 6-cyl

  • Automatic transmission
  • miles
Vehicle accelerated three times in below zero degree weather.

- Blue Mounds, WI, USA

problem #4

Mar 162004

A6 6-cyl

  • Automatic transmission
  • 67,000 miles

A D V E R T I S E M E N T S

On a below zero day the throttle on my 1999 Audi A6 quattro was fully engaged after lifting off the pedal. Car was stopped only killing the engine via the ignition. Vehicle was restarted and problem continued. After jostling the pedal and restarting vehicle was fine.

- Naperville, IL, USA

problem #3

Feb 062004

A6 6-cyl

  • Automatic transmission
  • 75,900 miles
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). I put the car in park, it red-lined and I turned off the ignition. When I restarted the car the throttle had reset. Fortunately my wife was not driving.

- Indianapolis, IN, USA

problem #2

Feb 022004

A6 6-cyl

  • miles
Consumer stated car just took off at a high rate of speed, and it almost hit another car, and son was nearly killed. It was hard to believe until consumer drove the car 3 weeks ago in temperature of 12 degrees. Consumer was pulling off the northway onto route headed West when the car just took off by itself. Consumer checked cruise control to see if it was on, it was not on.

- Chatham, NY, USA

problem #1

Jan 102004

A6 6-cyl

  • Automatic transmission
  • 665,300 miles
When the temperature drops below zero, the car accelerates even after you take your foot off the gas pedal. It happened several times last winter and again during this last cold spell in January. We were lucky to be able to get the car off the road and stopped. Downshifting and heavy braking almost didn't get it stopped. The car went to the shop again for a bandaid fix but I was told by the dealership that sometimes this particular car just does that. I was charged $130 for them to clean the throttle body and told that I should remove the air filter and clean the housing myself occasionally. This is absolutely unacceptable.

- Johnstown, NY, USA

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