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Electrical systemPart report

2004 Audi A4 Electrical system Problems

Complaints
15about this part
Share
8%of 189 total for the year
Median mileage
62,242miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 15 complaints about the electrical system of the 2004 Audi A4, 8% of the 189 complaints for this model year. Where a mileage was given, the median is 62,242 miles. 1 a fire, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“2004 Audi A4 1.8t engine sludge--complete engine failure. Audi absurdly refuses to honor their own extended warranty on the basis the car was run without oil. The engine failed internally because there was and is sludge blocking lubrication ports to the moving parts, I.e., failure. This is my executive synopsis, but I have volumes of supporting evidence, unbelievable as it is to think this could happen in america.”

NHTSA complaint #10356718, filed 2010-09, 99,000 miles

“While driving the car, there was a pop, then the car started running poorly. I stopped the car and checked the gauges; the check engine light was on. I returned home and called the dealer who suggested I call for a tow truck and have it brought in. He said that the vehicle couldn't be driven in this condition. He told me it was probably the coil pack. I called a tow truck and it was taken to the dealer. They replaced the coil pack that had been recalled at no charge to me, it has run fine since.”

NHTSA complaint #10299932, filed 2010-01, 59,000 miles

“I was driving my 2004 Audi A4 (1.8, convertible) on a local road at approx 30mph, when the accelerator suddenly dropped from under my foot and the car accelerated very rapidly. It felt like the cruise control had come on by itself (the cruise control was completely off at the time). I put the car in neutral and pulled over. When I shut the car off, the gas pedal popped up and felt normal. When I turned the car back on several times, it continued to immediately accelerate all the way with the gas pedal dropping to the floor. The car is now being towed to a mechanic. …”

NHTSA complaint #10549744, filed 2013-10, 41,000 miles

“I was driving on interstate 85 in south carolina returning to charlotte, n.c. When the engine of my 2004 Audi A4 started skipping severely. After pulling to the side of the road and letting the car sit for a while, I restarted the engine and the problem seemed to minimize somewhat. The following morning on the way to work the engine started skipping severely, and the vehicle seemed to be bucking heavily. I was able to get out of the traffic and pull to the side of the road. I called Audi of charlotte, and they advised to drive the car to there facility if it was drivable. …”

NHTSA complaint #10211559, filed 2007-12, 69,250 miles

“Electronic deficiency overriding speedometer and odometer on the car. When car is first started...three loud beeps occur and the ABS and brake warning lights start blinking on and off. Following the three loud beeps both the speedometer and odometer are disabled. When driving, the speedometer does not indicate the speed of the vehicle and the odometer does not indicate any mileage driven.”

NHTSA complaint #10743455, filed 2015-07, 93,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2023330%
2021327%
20209171%
2019330%
20181738%
2017611%
2016327%
2015316%
201439%
201328%
2012211%
201119%
201023%
200933%
200895%
2007105%
2006217%
20052411%
2004158%
20033215%
20027642%
20013527%
20001111%
1999116%
1998239%
19973334%
19962629%

Other parts of the 2004 Audi A4

Fuel system
56 complaints
Air bags
26 complaints
Engine cooling
18 complaints
Tires
16 complaints
Vehicle speed control
16 complaints
Visibility (wipers, defrost, mirrors)
16 complaints
Exterior lighting
14 complaints
Transmission and drivetrain
12 complaints
Engine
7 complaints
Other or unknown
6 complaints
Brakes
5 complaints
Body and structure
4 complaints

← All problems reported for the 2004 Audi A4

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology