Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2006 Audi A4 owners, lightly cleaned up (personal details are redacted by NHTSA).
The right headlight keeps flickering. It will turn off sometimes when using the windshield wipers, but other than that, the headlight works perfectly fine. When it flickers, an indicator warning light activates on the dashboard. This seems to be a wiring problem. Both headlights were changed and brand new when the car was purchased. Two years later, this flickering began. The only way to stop the flickering of the headlight is to completely turn off the headlights for a few seconds, then turn them back on. Everything is fine after that. Please recall this issue. I have read many posts online with other Audi A4 owners having the same problem with their vehicles.
"intermittent headlight malfunction. Over the course of a year of ownership, the headlights have malfunctioned (turned off), with no consistent cause apparent. The specific error message that appears in the driver information screen is "left (or right) headlight dipped". This condition is both unsafe, and illegal - as many states will issue a traffic violation for driving with a non-functioning headlight. It has happened approx. 40 times, the headlight flickers, then goes out, but will come back on when the car is restarted or clear if the headlight is turned off then back on. It will then be fine for days or weeks at a time. It has been consistently getting more frequent and worse. At times, both headlights will turn off by themselves while driving causing a very dangerous situation and quick action to avoid injury or death. Then randomly turn back on. …
I have the A4 w/ 3.1 liter v6. Almost immediately after purchase, transmission exhibited bumpy lurching start from stop. Audi diagnose said that's symptomatic of this transmission and engine combination. Nothing could be done to prevent. Within 1st year, the car would stall and completely shut down, necessitating a re-start. Sometimes upon start, and most notably (and the example cited above) when driving at slow speed. (I suspect the stall problems described relates to the lurching transmission problem). On this incident there was no check engine light. Took to Audi, they couldn't identify problem. I took to an independent -- they determined problem as fuel pump. Replaced fuel pump. Most recently the car stalled when initiating a left turn from a slow 10-15 MPH roll. …
I was driving on I-45 s to houston and at 9 pm, I tried turning my front fog light on as it was getting foggy occasionally. I was at 75 MPH speed on right lane, all of a sudden all lights went out, I immediately pulled over to the median and after playing around some kind of light came back, drove to nearest exit to gas station about a mile further and checked all lights, it was working fine now. I have read similar kind of complaint here and not sure if it is getting attention. Does death has to occur before nhsta and Audi listen to this problem. 75 MPH in interstate at night without lights on, can you imagine my situation. It can easily cause death and damage. Fix this problem because it is not bulb issue, it is manufacturer defect.
When I drive my car with the headlights on one randomly turns off and then I get a display in the dash that's says "left headlight dipped" this also happens to the right side. I have to turn the knob kn the dashboard on the off position and turn them back on the on position and they start working again. This is ridiculous and unsafe. Please help. Also my engine is burning oil very fast I just had an oil change and drove the car for 80 miles and the dip stick already shows half way full. I had the head gasket and vacuum pump gasket replaced but it still hasn't fixed the problem.
I was driving home and right headlight started flickering, almost like a strobe light then all of a sudden the light goes out then comes back on by its self. Then goes back off and stays off so I pull off the road. I look at the light and it is still out. I turn my lights off then back on and it works like new, but it keeps happening. This is very dangerous. What happens if both light goes out and this happens, its the manufacturer fault not mine. There should be a recall or do something about this before someone gets hurts, or lose their life.
Headlamp has "dipped" multiple times while driving (day and night) since I have owned the vehicle (now at 77K). There is an Audi TSB out for this issue but can never get a certified Audi dealership to fix this issue as they cannot make it happen on command when they inspect it. Not only is this a known issue but it is an issue that is a safety problem that Audi and it's affiliates do not take seriously or show determined interest in fixing.
Under normal driving conditions, the ignition coil pack in cylinder 1 failed. The local dealership replaced only the coil pack for cylinder 1. One week later, again under normal driving conditions, ignition coil pack 2 failed. This time it failed while in motion on a busy freeway in washington dc. The local dealer replaced coil pack 2, and petitioned Audi to replace 3 and 4. Audi acquiesced.
Upon initial start of the vehicle, just about every start, the left headlight will flicker and then shut off and show a left dipped headlight on the display. Shutting off the lights and turning them back on allows the bulb to turn on again, but the flickering keeps happening until the light warms up then it stops. The bulb will repeatedly flicker and shut off causing a serious safety concern.
On multiple occasions over the last two years the left and right headlights go out and a "dipped headlight" warning light shows up on the dash. Turning the headlights off then back on will bring them back on momentarily until a vibration knocks them out again. It's usually one side or the other but sometimes both lights go out at the same time. No fault codes are stored when this happens.
Electrical complaints in other A4 years
Frequently asked questions
How common are electrical problems on the 2006 Audi A4?
NHTSA has 21 complaints about the electrical system of the 2006 Audi A4, 7% of the model year's 295 complaints. The component named most often is ignition (1 mentions).
Is there a recall for 2006 Audi A4 electrical problems?
No. NHTSA lists no electrical system recall for the 2006 Audi A4, though it has 3 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2006 Audi A4 electrical problems start?
Half of the complaints with a recorded mileage happened before about 70,000 miles, and 6% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 0 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.