definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
25,540 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 #3

Sep 012005

A6 6-cyl

  • miles


1999 Audi A6 avant with serious safety issues. Consumer would like Audi to pay for the last 4 repairs that needed to be done. Consumer has had some serious safety issues with this vehicle and states that it is a lemon. There was a rumbling noise coming from the engine, there was an oil leak coming from the engine, the engine light illuminated due to a bad pipe, the front rotors and pads were replaced, the transmission was leaking, the back wheels were dragging so the pads would not release, the brake and ABS light illuminated, the cruise control was inoperative, T he sunroof was inoperative, the tie rods needed to be replaced, the timing belt, water pump, gasket oil cooler and serpentine belt were all replaced.

- Mount Pleasant, PA, USA

problem #2

Jan 012001

A6 6-cyl

  • Automatic transmission
  • 25,000 miles
For the past several winters, my 1999 Audi A6 2.8 quattro has had a failure in its cruise control mechanism. When ever it gets cold the cruise control often does not engage, and if it is really cold it may disengage after running for awhile even on level pavement (I.e. not undo engine strain-normal for disengagement). The major problem lies in that, at least twice, even though the cruise control has not been made to engage on prior attempts, it has engaged latter on its own, without prompting, bringing the car up to speed. Case in point: One time when coming into a residential area, it suddenly engaged, and started to try and come up to highway speeds. The dealership has tried several attempts to rectify this fault, but has been unable to find a solution. I have even offered to drive my car up to their national headquarters for their engineers to look at. Now Audi usa, will do no more toward this effort, in what I consider a serious and possible dangerous matter.

- Lexington Park, MD, USA

problem #1

May 162004

A6 6-cyl

  • 51,621 miles
Consumer's wife had a bad experience last month with the cruise control. She had the cruise set at 75 mph and hit the brakes to turn off the cruise control, but vehicle did not respond. She turned off the switch on the steering column, and that did not stop the cruise control. She put both feet on the brakes and tried to stop vehicle, but the engine continued to run. Fortunately, consumer was able to power brake the vehicle, and bring it over to the shoulder of the highway. Then, brought the speed down enough to slam the transmission into park, and abruptly stop the vehicle's motion. All four wheels were smoking, and she turned the vehicle off. She called the maplewood Audi dealer, where consumer had the car in for full service and scheduled a checkup. Vehicle was towed to the dealer, and kept for diagnostic investigation by the technician. When the technician turned the vehicle on engine revved and rpms went back up. The service department pulled the throttle cable from vehicle. And discovered cracks in the housing of the cable. But were not certain that this was the problem. It was technician's guess. Consumer's wife questioned this because of the cruise control which was not cable related.

- Hudson, WI, USA

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