Four problems related to vehicle speed control have been reported for the 2004 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Audi A4 based on all problems reported for the 2004 A4.
Was driving on freeway for a few hours during which car was running fine, and car suddenly lost power just after I got off freeway and approached a mountain road incline. There was no warning light, or prior symptoms to engine failure, it just stopped. With help, I was able to get car out of the middle of the road and to safety. Tried to troubleshoot, used engine error code reader, and no fault codes found. Performed basics checked for potential fuel vapor lock due to altitude; checked oil, coolant and fuel levels- and all levels were ok. Battery was functioning - as radio, lights worked. Car has been consistently serviced and maintenance was current. Car was towed to nearest dealer, diagnosis by dealer fuel pump failure due to clogged fuel filter. My issue is that Audi does not indicate service maintenance for fuel filter. There is not any maintenance recommendations or guidance in either the owner's manual or published list of recommended services to replace or check filer. There also were not any warning lights, fault codes or indications to watch for. I feel that it is negligent of the manufacturer to not indicate any service interval to change fuel filter in order to prevent fuel pump failure, and to ensure the safe operating conditions of the vehicle. The car lost power on a winding mountain road and put me at danger without warning. I am curious if this fuel pump incident could be associated with known fuel pump issues, NHTSA #pe08027. Key side notes, while I am the second registered owner, this car was purchased by my father who was the original owner, but for insurance and registration purposes the vehicle was transferred over to me, but I have all original records of the vehicle and can verify all maintenance services have been performed.
The vehicle according to the Audi dealer has a bad automatic tcm transmission control module that causes the car to slip gears or not shift down when coming slowing down and then needing to accelerate. The vehicle will stay locked in 3rd gear and when pulling out on to the freeway or a busy street it makes it difficult to get up to speed. When parked on a slanted driveway or street the vehicle may not engage a gear once it has been selected and the car will roll down hill.
: the contact stated while driving 35 mph uphill on a street, upon making a right turn, the vehicle accelerated to 40 mph without warning. The contact applied brake pressure which stopped the acceleration. The vehicle was inspected by a dealer who was unable to duplicate the problem. The manufacturer was alerted.
Vehicle lurched or accelerated upon final parking near a stop with foot off accelerator pedal and on brake pedal. Car accelerated for more than half a mile at 80 mph. Consumer was able to control vehicle and put it in neutral. Dealer indicated vehicle operated as designed by the manufacturer, there was nothing wrong with vehicle.
| Cruise Control problems | |
| Accelerator Stuck problems | |
| Vehicle Speed Control problems | |
| Accelerator Pedal problems |