2005 Audi A6 Electrical system Problems
- Complaints
- 16about this part
- Share
- 18%of 91 total for the year
- Median mileage
- 107,500miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 16 complaints about the electrical system of the 2005 Audi A6, 18% of the 91 complaints for this model year. Where a mileage was given, the median is 107,500 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The left drivers side break light/signal will stop working intermittently. I have noticed that it tends weather dependent. I have read Audi forums whom have said that the electrical wiring when exposed to heat (70 degrees fahrenheit and above) will short causing the LED break/signal light to not work. My mechanic stated that it is also because of a faulty light control module + wiring. Due to the intermittency and high cost of the job it has not been something that I have been able to fix. …”
NHTSA complaint #10913780, filed 2016-10, 120,000 miles“I purchased a 2005 Audi A6 3.2 quattro in august of 2008 with 37,000 miles. In december 2008 I took the car to the Audi dealer in pasadena because the left rear taillight, left rear reversing light, and left rear fog light were shorting out off and on. Sometimes they would work, sometimes they wouldn't. The dealer said the connectors to that left tail lamp assembly were melted and it was fixed under warranty. …”
NHTSA complaint #10332368, filed 2010-05, 51,000 miles“My car was running perfectly, next time I went to drive it, it wouldn't start. The wheels and shifter are locked up .the lights and bells work, but it turns out that the module that recognizes the key has failed. I have been on just about every Audi forum to investigate this, and this is an incredibly common complaint. The part that is broke cannot be fixed, rather the entire steering column has to be replaced at a cost of at least $2000, in some cases over $3000. This is an obvious design defect and Audi needs to be held responsible. …”
NHTSA complaint #10777711, filed 2015-09, 135,000 miles“I was driving my car in my work parking lot when a loud beep occurred and my car issued a warning for parking break malfunction. Two lights, ESC and ABS also lit up when the beep sounded. I immediately stopped driving, engaged the parking brake (which worked) and disengaged it. I am the second owner of the car and after some research found that the brake module and mmi both had been upgraded by the previous owner. I continued to witness these symptoms and am waiting for my dealership to run a diagnostic. …”
NHTSA complaint #10542433, filed 2013-09, 103,542 miles“During a recent rain storm I went to start the car to discover 6 inches of water in the back seat. Rear airbag and some electrical system had been fried. When I contacted Audi they said that it was not a warranty issue that it was my fault. That a line under the battery compartment had been clogged by pine needles causing the water to flow into the car through the airconditioning system. It seems to me that this is a design flaw and should be covered by Audi.”
NHTSA complaint #10300425, filed 2010-01, 52,000 milesRelated service bulletins
- 10207833Feb 7, 2022This bulletin contains technical information regarding when the parking aid sporadically warns of obstacles that don't exist or it is inoperative/constant warning.
- 10177300Jul 8, 2020This informational bulletin explains when the range display is empty in the on-board computer.
- 10176408Jun 9, 2020This informational bulletin contains instructions on how to use the QR code in a TSB.
- 10166284Sep 17, 201900 Software Version Management (SVM), operating instructions
- 10164518Aug 28, 2019This communication is issued to inform dealers of updated shipping regulations related to lithium ion batteries.
- 10161670Jun 18, 2019This bulletin contains general software update instructions for vehicles with PR Code 7UH. 2016-2020 A3, 2016-2020 A3 Cabrio, 2016 A3 Sportback, 2016-2020 A4, 2016-2020 A4…
- 10155404Mar 13, 2019This technical service bulletin provides troubleshooting information for the vehicle locking system.
- 10127949Aug 21, 2017This informational bulletin contains resource information for when the traffic feature is inoperative in the MMI navigation.
- 10128205Mar 23, 2017This informational bulletin contains instructions for sychronizing the remote key after the battery has been disconnected or replaced.
- 10123653Dec 10, 2015Supersedes Technical Service Bulletin Group 17 number 14-49 dated April 3, 2014. When the vehicle is completely refueled, the vehicle range (?distance to empty?) that is…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 5 | 71% |
| 2025 | 2 | 33% |
| 2021 | 11 | 61% |
| 2020 | 18 | 69% |
| 2019 | 84 | 74% |
| 2018 | 1 | 9% |
| 2017 | 2 | 10% |
| 2016 | 8 | 16% |
| 2015 | 3 | 14% |
| 2014 | 2 | 5% |
| 2013 | 7 | 13% |
| 2012 | 13 | 22% |
| 2011 | 3 | 14% |
| 2010 | 2 | 12% |
| 2009 | 1 | 5% |
| 2008 | 7 | 10% |
| 2007 | 6 | 11% |
| 2006 | 13 | 19% |
| 2005 | 16 | 18% |
| 2004 | 3 | 9% |
| 2003 | 14 | 21% |
| 2002 | 15 | 17% |
| 2001 | 14 | 12% |
| 2000 | 36 | 24% |
| 1999 | 37 | 17% |
| 1998 | 8 | 6% |
| 1997 | 14 | 70% |
| 1996 | 38 | 75% |
| 1995 | 10 | 63% |
Other parts of the 2005 Audi A6
43 complaintsBrakes
10 complaintsSteering
8 complaintsExterior lighting
6 complaintsElectronic stability control
5 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsEngine
4 complaintsVehicle speed control
4 complaintsEngine cooling
3 complaintsBody and structure
3 complaintsTransmission and drivetrain
3 complaintsOther or unknown
2 complaints
← All problems reported for the 2005 Audi A6
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