really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
77,229 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.

2003 Audi A4 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2003 Audi A4:

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

2003 Audi A4 Owner Comments

problem #14

Aug 032015


  • 140,000 miles


03 Audi A4 6 speed auto cvt transmission, this vehicle has known issues with shifting from 1st to 2nd gear too soon. While driving this vehicle from a complete stop on an on ramp on rt 80 I hit the gas and it would shift from first to second and back to first then lurch forward while rolling. While this is going on I am trying to merge on the highway which put my car into the right lane doing about 2 mph with traffic (which would be a safe distance if this issue didn't happen) having to come to an abrupt stop not to hit my car. This is an known issue with these transmissions and there is no recall on them since new. I have experienced this issue numerous time as many others with this vehicle does. There are numerous forums with consumers complaining of the same issue. This needs to be addressed before someone gets hurt.

- Lake Hopatcong , NJ, USA

problem #13

Dec 212014

A4 4-cyl

  • 112,600 miles
While driving tostore vehicle accelerator stuck and would not return back to position. I applied brake very hard to maintain control and was able to pull over into parking lot and stop although engine continued to rev like pedal was pushed to the floor. I putcar in park and it redline the tach without my foot on the pedal almost causing the engine to blow.very dangerous.glad I was driving instead of my wife.L bought the car 2 mos. Ago from checkered flag Volkswagen used car lot and they don't think this falls under warranty, even something this dangerous, and seeing other complaints I'm guessing Audi doesn't either. At least until the cost analysis of deaths vs. Repair gets a little closer.

- Virginia Beach, VA, USA

problem #12

May 192013


  • 60,000 miles
The contact owns a 2003 Audi A4. The contact stated that while driving 25 mph, the vehicle accelerated independently. The contact engaged the vehicle into neutral to stop the vehicle however, the engine rpms continued to race as the engine roared loudly. The contact exited the vehicle and later returned to restart the engine but the failure recurred. The vehicle was towed to a dealer for diagnosis and the contact was informed that the floor mat had become lodged under the accelerator pedal, causing the failure. After leaving the dealer the failure recurred. The vehicle was returned to the dealer and the contact was awaiting diagnosis of the failure. The VIN was unavailable. The failure and current mileage was 60,000.

- San Francisco, CA, USA

problem #11

Apr 022012

A4 4-cyl

  • 112,000 miles


I just experienced a serious issue of the gas pedal getting stuck as I was driving out of a parking lot. I tapped on the pedal a couple of times thinking it might get it to unstick but had to press on the brake to bring it to a stop. I put it in neutral and could hear the engine roar up and the tachometer go past 5000 rpms. I reached down to the pedal with my hand and forced it back up to the resting position. This happened twice during the short trip and my colleague was in the passenger seat who witnessed what happened. There was no physical objects in the way of the pedal like the floor mat etc. I'm talking with Audi usa to see what steps I should take to investigate the problem and fix it.

- Santa Clara, CA, USA

problem #10

Apr 062011


  • 90,000 miles
The car probably has faulty tcu, because transmission would sometimes jerk if going from complete stop and pressing gas pedal (even lightly). The car at first wouldn't go, then all of the sudden and unexpectedly would accelerate. I believe this is common in Audi, and they should fix that.

- Renton, WA, USA

problem #9

Sep 132010


  • miles
While I was driving my vehicle, the approaching light turned yellow, then red, and the vehicles in front of me stopped, I applied the break on my vehicle, I had plenty of distance between me and the other vehicles, however as I am applying the break, my vehicle began to slow and all of a sudden the car began to accelerate uncontrollably, RPM was over 5000, the brakes did nothing to stop the vehicle, and the vehicle accelerated even more, I had no choice and nowhere to turn off to avoid an accident, my vehicle plowed into the vehicle located in front of me on the right hand side of the road. I was lucky that at least there was a car in front of me, if my car was the first one in the line, I would not be able to stop it and could have hit the pedestrians crossing the road. This is the worst defect in a vehicle, and a very dangerous defect that could cause severe consequences.

- Elkins Park, PA, USA

problem #8

Nov 252010

A4 4-cyl

  • 99,600 miles


While driving from ga to nc the car accelerated suddenly from a traffic light. I could feel the accelerator move away from my foot and I had pressed the clutch and break to avoid an accident. I noticed the tachometer was above 5000 RPM and I turn off the car and coasted into a gas station. I checked the floormats and the accelerator and everything seemed fine. I restarted the car and cautiously continued my trip. Everything seemed okay until I was close to my destination. Then I experienced the same uncontrolled acceleration. Again, the only way to stop the car was to turn off the engine. I took the car to an Audi dealer in nc and they told me there were no faults and therefore no problem. They suspected the floormats.

- Atlanta, GA, USA

problem #7

Sep 102010


  • 146,000 miles
Driving on highway at 60mph, removed foot from gas pedal, but gas pedal did not come up and car did not slow down. Pressed on brakes, but was not able to stop car with just brakes. Had to use handbrake as well to stop car. Took to dealer and waiting on diagnosis.

- Redlands, CA, USA

problem #6

Jul 042010


  • 63,000 miles
While driving my 2003 Audi A4 on the mass pike freeway into boson, as I approached a toll booth, I tapped the break to disengage the cruise control. The car slowed down so that I passed through the toll both at approximately 18 mph. After passing through the toll booth, I again started to accelerate, but once touching the gas pedal, it seemed to go down on its own, and the car accelerated, not under my control. I immediately stepped on the brakes to slow the acceleration, but as soon as I took my foot off the brakes, the car continued to accelerate to about 60 mph, at which point I applied the breaks again. Luckily, traffic was minimal, and I was able to keep constant pressure on the brake pedal to keep the car speed down, and avoid other vehicles while the brakes and accelerator worked against each other. Initially, there was nowhere to pull the car off the road, but then as I approached a small pullout, I moved the car into the outside lane and turned off the engine. I thought maybe the cruise control had malfunctioned, and by turning off the car, it would be reset. So after setting several minutes, with the car in park, I tried starting the car. The engine immediately revved up to full speed, so I again turned the car off. After setting another 10 minutes, I tried starting the car again, and it started normally. I was able to drive the car home without experiencing any additional acceleration issues. Audi looked at the car and determined it was a faulty brake switch that prevented the cruise control from disengaging. However, the cruise control was not active when the uncontrolled acceleration occurred, and their own mechanic said the faulty switch would not explain the full throttle engine start after shutting off the engine. They said they replaced the brake switch but will take no further action. Based on the Audi mechanics comments, I do not feel the issue has been resolved.

- Milford, MA, USA

problem #5

Apr 162010


  • 75,000 miles
Sudden acceleration. I was coming back from the store, and twice I stepped on the gas and the pedal went to the floor on its own! I hit the brake and kept the car from running away while I pulled the pedal up with my other foot. When I got back home, I put it in neutral, gave it a little gas, and it went into full acceleration. I could feel the gas pedal pull away from my foot and go to the floor. I had to turn the key off to stop it. It was not "floor mats" or driver error. The next day, the problem was gone. I drove to the Audi dealer. They replaced the gas pedal assembly and the problem appears to be fixed.

- Scottsdale, AZ, USA

problem #4

Apr 032010


  • miles


Sudden, unintended acceleration of 2003 Audi A4 while in 4th gear. Rpms spiked and remained at 7 after foot was removed from accelerator. Experienced loss of control of steering. Was eventually able to slow and stop car via brakes. After completely shutting car off and removing key, car was restarted and engine revved up to 7 rpms with zero acceleration. Occurred on queensborough bridge - police were called to assist.

- New York, NY, USA

problem #3

Oct 082009


  • 49,000 miles
The contact owns 2003 Audi A4. While approaching a traffic light at 20 mph the vehicle accelerated without intention. As a consequence she rear-ended another vehicle. The front-end of the vehicle was damaged. The vehicle was in the process of being towed to an authorized dealer. The failure and current mileages were 49,000.

- Easton, PA, USA

problem #2

Sep 182009


  • 71,000 miles
My 2003 Audi A4 on two different occasions has started to accelerate to high speeds on it's own. The first time it happened I was pulling out and I pushed the gas and it just started to pick up speed I pulled over and then tried to pull out again and it started again to pick up speed I noticed the cruise control was on and so I turned it off and then it was fine. The second time I was pulling out and pushed the gas to speed up and again it started to accelerate very fast and so I pulled over again and thought I must of hit it into speed control again, but this time with cruise control off it still continued to accelerate and it was harder to get the car to stop I had to push the brake pedal really hard and I thought it wasn't going to stop. Then when I did get it to a complete stop I put the car in park and the engine continued to rev, as if I were pushing the gas pedal. This could have easily resulted in a crash. If it were in the winter months I would have crashed, and I had my one year old boy with me this was very frightening for both of us.

- Harrisville, UT, USA

problem #1

Feb 282006

A4 6-cyl

  • Automatic transmission
  • 63,000 miles
Under hard acceleration, the throttle on my 2003 Audi A4 became stuck wide open for approximately 15 seconds. In order to stop the car, I needed to turn off the ignition. I was able to reproduce the problem with the car in neutral, and the throttle seems to persistently stick when the engine revs over 5000 RPM. I'm planning on taking this car to an Audi dealer tomorrow to have the problem diagnosed further.

- Woodbury, CT, USA

Not what you are looking for?