Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

10.0

really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
50,270 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.

2005 Audi A4 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2005 Audi A4:

Unsubscribe any time. We don't sell/share your email.

2005 Audi A4 Owner Comments

problem #7

May 292015

A4

  • 95,000 miles

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

As I was driving the gas pedal went to the floor full throttle. I almost had an accident. I final got the car over to the road at a stop by putting the car in neutral. The engine revved up as high as it could go. So I cut the car off then cut it back on and it continued to have the same problem. It took 3 times of cutting the car off and waiting a few minutes before the car returned to normal.

- Eastpointe, MI, USA

problem #6

May 312012

A4

  • 69,224 miles
The contact owns a 2005 Audi A4. While driving approximately 35 mph, the driver depressed the accelerator pedal and noticed that the accelerator pedal had become stuck. The vehicle suddenly accelerated to 100 mph erroneously. The contact continued depressing the brake pedal and was able to stop the vehicle. The vehicle was not taken to the dealer for diagnostic testing or possible repairs. The driver inspected the vehicle and noticed that the floor mat retention system failed and caused the floor mat to become lodged under the accelerator pedal, causing the failure. The approximate failure mileage was 69,224.

- Lovettsville, VA, USA

problem #5

Jul 252011

A4

  • 90,668 miles
Unintended acceleration: Vehicle continued to accelerate after entering highway. Driver put the car in neutral (manual transmission). Tachometer continued to increase until it red-lined. Driver pulled off the highway and turned the engine off. The throttle released with a popping noise. Driver observed the throttle and the mat did not appear to be pushing on the throttle but the mat was not secured in place. Took the car to the dealer (where it was bought and serviced regularly). They ran diagnostic scan, no faults in system. Owners wrote and called Audi customer care and were informed car is working as designed. Weather was hot and dry (July).

- Cazenovia, NY, USA

problem #4

Oct 072010

A4

  • 35,000 miles

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

2005.5 (midyear) Audi A4 2.0T while driving on the highway, the car began to accelerate out of control for approximately 15-25 seconds despite the fact that the accelerator was not being depressed. This occurred even though no pressure was being applied to the gas pedal. The car quickly picked up speed, reaching speeds of 90+ mph on a crowded urban highway during rush hour. A collision was barely avoided. There was no mechanical obstruction to the gas pedal (I.e there was no mat or debris in the way). Furthermore, there was limited brake function at this time. After 15-25 seconds the car stopped accelerating on its own. The issues: 1. uncontrolled acceleration to redline with no control over the accelerator 2. braking function failed to override the accelerator function (as explained by my dealer. If you brake while accelerations, the brakes win, which did not occur in this case.) I had the vehicle inspected by mu Audi service department who said that nothing was wrong with the car.

- Bal Harbour, FL, USA

problem #3

Oct 152009

A4

  • 49,500 miles
I believe this may be a repeat complaint, but Ms. Demeter says it is not on file. 2005 Audi A4 cabriolet, 6 cylinder (normally aspirated). Sudden persistent acceleration. I was rapidly accelerating from about 25 mph going up a hill trying to make a green light about.2 mile away. When I approached the intersection, I released the pedal but the car kept accelerating. Firm brake pressure slowed the car, but it reaccelerated until I brought it to a stop. I made sure the cruise control was in the "off" position, even though I had not used it. I drove about 2 miles to the next major intersection, where I stopped for alight. While I was sitting there with my foot on the brake, the engine began to rev. I put the vehicle in neutral, and it redlined. I turned the car off, and reached down to see if the floor mat was out of place. I gave it a pull but did not feel it over the gas pedal. I started the car again, and slowly accelerated away form the intersection. The problem has not recurred, even when I tried to reproduce it.

- Mclean, VA, USA

problem #2

Jul 052006

A4 4-cyl

  • Automatic transmission
  • 12,500 miles
The accelerator stuck and would not disengage - despite the fact that I removed by foot from the throttle. I applied the brakes to get the car to stop and after a few seconds the accelerator disengaged but then re-engaged (by itself) and then disengaged three or four times in three to four intervals.

- Fayetteville, AR, USA

problem #1

Apr 042005

A4 4WD 4-cyl

  • Automatic transmission
  • miles
The contact owns a 2005 Audi A4 2.0 liter turbo engine. The non linear acceleration, it will bog and surge while in traffic. While pressing hard on the gas, it will suddenly surge forward, causing drivers behind him to constantly apply the brakes. Also, the low speed power steering will not come on. It was limited and very hard to steer. This problem with the power steering started intermittently. The contact's vehicle was involved in an accident. But because of the lack of power steering acceleration prevented from being hit. The vehicle has been at the dealership five times for the accelerating problem, and once for the power steering problem. The dealership has not corrected the acceleration problem. The dealership started a diagnostic test on the power steering. The contact contacted the manufacturer many times, and they were cooperative. The repairs are being delayed because the dealership forgot to order the parts. The numbers of failures were 100 times at least. The problems first began 10 days after purchase of the vehicle on April 4, 2005, and it was in for service on April 14, 2005. The consumer was told the bog and surge was within Audi's specifications and no corrective action would take place. 11/15/05.

- Rockford, IL, USA

Not what you are looking for?