1999 Audi A6: adaptive cruise control problems

Filed Apr 9, 2019 · Electrical, Steering · 180,000 miles · IA

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.

Filed Jan 28, 2015 · Acceleration, Brakes · 167,770 miles · WA

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.

Filed Dec 28, 2010 · Acceleration · 110,000 miles · OH · crash

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.

Filed Nov 2, 2007 · Acceleration, Brakes · PA

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. *kb 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.

Filed Jan 25, 2005 · Acceleration · 94,000 miles · PA

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.

Filed Dec 17, 2004 · Acceleration · 25,000 miles · MD

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.

Filed Jun 21, 2004 · Acceleration · 51,621 miles · WI

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.

Filed Apr 20, 2004 · Acceleration · NY

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. *ak

Filed Feb 17, 2003 · Fuel system · 49,000 miles · MA

Car accelerate on it's own. About 15 minutes into trip, started to feel the car accelerating on it's own. When I let go of the accelerator, RPM did not drop. Double check the cruise control, turn it on and off makes no difference. Pull off road, put in neutral to stop, race to 4k RPM. Restart car, still @4k. Stopped for 5 minutes, restart, back to normal. An accident waiting to happen!