1999 Audi A6 Engine cooling Problems
- Complaints
- 17about this part
- Share
- 8%of 217 total for the year
- Median mileage
- 72,500miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 17 complaints about the engine cooling of the 1999 Audi A6, 8% of the 217 complaints for this model year. Where a mileage was given, the median is 72,500 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Engine oil leaks. Wife (main driver of vehicle) reported strong smell of burning oil. Dealer mentioned that this is a common problem and that manufacturer has covered repair for other owners. Manufacturer declined assistance for our model year (1999 with 37,000 miles) even though they would approve a 2000 model year with up to 62,000 miles.”
NHTSA complaint #10059086, filed 2004-02, 37,000 miles“1996 Audi A6 customer states that the catalytic converter has been replaced twice and still having problems**cc the consumer was informed that the after market muffler he purchased didn't work well with Audi's and it was recommended that the consumer only use a factory catalytic converter.”
NHTSA complaint #10189022, filed 2007-04, 97,804 miles“Audi A6 customer states that after receiving a recall notice she took her car in for repairs and was given a larger bill for other things that need to be repaired**cc the consumer stated the dealer made repairs to the steering and engine. Update”
NHTSA complaint #10189007, filed 2007-04, 59,632 miles“1999 Audi A6 2.8 liter catalytic converter failed at 93,000 miles november 2003. Interior of catalytic converter is loose and rattles very loudly, the check engine light is on, meaning the the emissions component is ineffective. Dealer states out of warranty.”
NHTSA complaint #10052806, filed 2004-01, 92,000 miles“Engine oil leak: driver side valve cover leaks after cam seals, water pump, and timing belt replaced. Vehicle now has 95,000 miles. Valve cover gasket on that side replaced 2 times each time only lasts one week before oil leak develops. Worse leak each time.”
NHTSA complaint #10052805, filed 2004-01, 75,542 milesRelated service bulletins
- 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…
- 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…
- 10231130Jun 30, 2014Idenifying and mixing factory fill engine coolants
- 10122415Jun 20, 2014Supersedes Technical Service Bulletin Group 19 number 13-41 dated June 20, 2013. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have…
- 10121324Sep 5, 2013Supersedes Technical Service Bulletin Group 10 number 10-02 dated September 14, 2010. Prior to engine replacement, any debris lodged in transferred assemblies must be removed. If…
- 10216662Jun 20, 2013Discontinuation and mixing of Audi-approved engine coolants.
- 10123587Jun 20, 2013Supersedes Technical Service Bulletin Group 19 number 13-35 dated March 25, 2013. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2021 | 1 | 6% |
| 2016 | 2 | 4% |
| 2015 | 4 | 18% |
| 2014 | 1 | 2% |
| 2013 | 1 | 2% |
| 2012 | 3 | 5% |
| 2010 | 2 | 12% |
| 2008 | 3 | 4% |
| 2007 | 3 | 6% |
| 2006 | 2 | 3% |
| 2005 | 3 | 3% |
| 2004 | 3 | 9% |
| 2003 | 3 | 5% |
| 2002 | 15 | 17% |
| 2001 | 18 | 16% |
| 2000 | 21 | 14% |
| 1999 | 17 | 8% |
| 1998 | 6 | 5% |
| 1997 | 1 | 5% |
| 1996 | 2 | 4% |
| 1995 | 1 | 6% |
Other parts of the 1999 Audi A6
39 complaintsFuel system
39 complaintsElectrical system
37 complaintsVehicle speed control
24 complaintsSteering
19 complaintsSuspension
15 complaintsTransmission and drivetrain
12 complaintsAir bags
8 complaintsSeats
8 complaintsBody and structure
8 complaintsVisibility (wipers, defrost, mirrors)
8 complaintsExterior lighting
7 complaints
← All problems reported for the 1999 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