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Engine coolingPart report

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 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
2022117%
201812%
201724%
201515%
201413%
201314%
2010914%
200954%
200842%
2007126%
200662%
200584%
20041810%
2003178%
20022815%
20013124%
20001111%
19992815%
19982811%
19971212%
199656%

Other parts of the 2006 Audi A4

Exterior lighting
159 complaints
Air bags
73 complaints
Electrical system
21 complaints
Engine
15 complaints
Transmission and drivetrain
14 complaints
Fuel system
10 complaints
Other or unknown
7 complaints
Vehicle speed control
7 complaints
Brakes
5 complaints
Steering
5 complaints
Visibility (wipers, defrost, mirrors)
5 complaints
Electronic 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