2006 Audi A4 Engine cooling Problems
- Complaints
- 6about this part
- Share
- 2%of 295 total for the year
- Median mileage
- 71,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the engine cooling of the 2006 Audi A4, 2% of the 295 complaints for this model year. Where a mileage was given, the median is 71,000 miles. 2 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Car did not show any signs prior to check engine light coming on. Within several minutes of check in light appearing the car begin driving rough and smoke poured from under the hood. My husband quickly cut the wires of the coil pack from the housing to prevent the fire from spreading, as I grabbed the fire extinguisher.”
NHTSA complaint #10326534, filed 2010-04, 84,098 miles“Audi A4, 2006 convertible : after driving the car 12 miles in stop and go traffic on a 2 lane street I noticed smoke coming from under the hood, not a lot. No warning lights on the dash. Temp outside was 75. So I drove another 2 miles, then I saw a lot of smoke coming from under the hood - I turned on the turn signal to get into the other lane and then the coolant low sign came on the dash. Then a lot more smoke. After letting the car cool in a parking lot, I added the coolant/water mix as called for in the service book ( had the staff at oreilly auto parts look up the correct coolant). …”
NHTSA complaint #10511688, filed 2013-05, 100,500 miles“The vehicle suddenly and unexpectedly loses power while merging onto the interstate. Power loss generally lasts for approximately one minute. Power loss is continually experienced while attempting pass other vehicles. On occasions, the vehicle goes into limp-mode, making it difficult to maintain highway speed.”
NHTSA complaint #10385230, filed 2011-02, 50,000 miles“Extreme vibrations are occurring while vehicle is stopped and in gear. This problem has existed since I drove it off the lot new. It now has only 8000 miles. The vibration levels vary and can fluctuate. When vibrations are high the vibration is nauseating, tingles my ears, and rattles my teeth. My keys vibrate enough to produce sound and they appear blurry. My local Audi dealer says there is nothing they can do about it currently, but suggest there may be future remedies. They did tighten my seat and say that my car is operating within specifications. …”
NHTSA complaint #10173147, filed 2006-11“The contact owns a 2006 Audi A4. While driving 35 MPH, the contact noticed smoke coming from the front and back of the vehicle. She pulled the vehicle over and turned off the ignition. She then heard a loud explosion underneath the vehicle. She exited and noticed flames underneath the vehicle and from under the hood as well. When the fire department arrived, the front half of the vehicle was completely engulfed in flames. The fire was extinguished, but the fire department was unable to determine the cause of the failure. A fire report was filed. …”
NHTSA complaint #10266227, filed 2009-04, 33,000 milesRelated service bulletins
- 10193573May 13, 2021This technical service bulletin reminds the reader to check for metal debris when replacing an engine.
- 10186945Feb 2, 2021This bulletin contains instructions for using the UV additive to find engine oil leaks.
- 10181059Oct 5, 2020This bulletin contains instructions for using the UV additive to find engine oil leaks.
- 10176873Jun 25, 2020This bulletin contains instructions for identifying and mixing factory fill coolants.
- 10123764Sep 8, 2015Supersedes Technical Service Bulletin Group 19 number 15-61 dated July 7, 2015. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been…
- 10128399Jul 7, 2015Supersedes Technical Service Bulletin Group 19 number 14-50 dated June 20, 2014. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have…
- 10119945Mar 17, 2015Supersedes Technical Service Bulletin Group 10 number 13-10 dated September 5, 2013. Prior to engine replacement, any debris lodged in transferred assemblies must be removed. If…
- 10119942Mar 12, 2015Supersedes Technical Service Bulletin Group 01 number 08-05 dated December 22, 2008. The MIL is on. DTC P0299 (Turbo/Super Charger Underboost) is stored in the engine control…
- 10119946Mar 6, 2015Supersedes Technical Service Bulletin Group 17 number 13-35 dated January 9, 2013. This bulletin lists engine oils that meet Audi oil quality standards (VW 501 01, 502 00, 505…
- 10120682Feb 13, 2015Supersedes Technical Service Bulletin Group 01 number 13-69 dated February 14, 2013. Noises and inconsistent engine operation after cold start during the catalyst heating phase…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 1 | 17% |
| 2018 | 1 | 2% |
| 2017 | 2 | 4% |
| 2015 | 1 | 5% |
| 2014 | 1 | 3% |
| 2013 | 1 | 4% |
| 2010 | 9 | 14% |
| 2009 | 5 | 4% |
| 2008 | 4 | 2% |
| 2007 | 12 | 6% |
| 2006 | 6 | 2% |
| 2005 | 8 | 4% |
| 2004 | 18 | 10% |
| 2003 | 17 | 8% |
| 2002 | 28 | 15% |
| 2001 | 31 | 24% |
| 2000 | 11 | 11% |
| 1999 | 28 | 15% |
| 1998 | 28 | 11% |
| 1997 | 12 | 12% |
| 1996 | 5 | 6% |
Other parts of the 2006 Audi A4
159 complaintsAir bags
73 complaintsElectrical system
21 complaintsEngine
15 complaintsTransmission and drivetrain
14 complaintsFuel system
10 complaintsOther or unknown
7 complaintsVehicle speed control
7 complaintsBrakes
5 complaintsSteering
5 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsElectronic stability control
4 complaints
← All problems reported for the 2006 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