2000 Audi A6 Engine cooling Problems
- Complaints
- 21about this part
- Share
- 14%of 148 total for the year
- Median mileage
- 56,500miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 21 complaints about the engine cooling of the 2000 Audi A6, 14% of the 148 complaints for this model year. Where a mileage was given, the median is 56,500 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I have had a lot of problems with my Audi 2000 A6 2.7 turbo emissions system. I was told I had a bad catalytic converter at 90,000 and they said it was not under warranty. I looked on the internet and found hundreds of complaints about the Audi's catalytic converters. Why do they only last 80,000 to 90,000 miles? Then we have to pay $3,000.00 to fix it to pass the california smog tests? That is not fair.”
NHTSA complaint #10332280, filed 2010-05, 88,000 miles“2000 Audi A6 4.2l v8 quattro engine cooling system failure. The plastic coolant pipe between the oil cooler housing and the engine block fails causing potential catastrophic coolant loss, overheated engine and potential fire. The plastic pipe hardens/crumbles with age, approximately 10 years and 135k miles. I replaced the pipe...it takes about 10 manhours. The replacement Audi part is maybe $20 but it is still plastic. I replaced it with a billet aluminum part with double o-rings. Dealer wanted $2900.00 to repair!! …”
NHTSA complaint #10342338, filed 2010-07, 140,000 miles“At 65k miles, my baby daughter and I were driving 70 MPH down vail pass on i70 in colorado when the engine light starts to flash. I then lose all power, brakes and steering due to a total engine and turbo failure. This problem was discovered to be caused by a water pump failure, causing the timing belt to fail, in turn causing the engine to completely seize. Audi refused to take responsibility for all the costs associated with replacing the engine and didn't lend any concern that this is a safety issue. …”
NHTSA complaint #10054246, filed 2004-01, 65,000 miles“Both catalytic converters failed at 78,000 miles. Called and wrote to Audi, wanting this covered under warranty; was told three different things regarding coverage (1. 'don't know, 2. 7years and 70,000 miles, 3. 8 years and 80,000 miles.) was repeatedly rebuffed. Cost $4600 to fix. Audi 2000 A6. Wrote to vice president - Audi of america - axel meese - two months later response said no again and quoted some other warranty (3 years and 50,000 miles) in all my years of car owning, I have never had one catalytic converter fail, let alone two. …”
NHTSA complaint #10100658, filed 2004-11, 78,000 miles“Near total loss of power (intermittent) 17 error codes in obd. New triptonic transmission 1 month after expiration of warentee. Extended warentee never offered by Audi. Error codes include throttle housing and cam error. I have spent nearly $7,000 in 10 monthes on mechanical repairs and mechanic says that I need approximatly $6,300 more. Audi said that I can have the dealer run a dignostic at my own expense. Addition to the $6,300 need. Check engine light has constantly come on since purchase. Dealer siad that he advises customer many times to disconnect light. …”
NHTSA complaint #10126377, filed 2005-06, 52,000 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…
- 10210680Jun 3, 2014As the sump pan gasket settles, the torque of the bolts decreases and the seal may leak. Automatic transmission fluid is leaking at the sump pan gasket.
- 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.
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 2000 Audi A6
36 complaintsBrakes
29 complaintsFuel system
23 complaintsTires
14 complaintsSuspension
12 complaintsSteering
11 complaintsAir bags
8 complaintsTransmission and drivetrain
8 complaintsOther or unknown
6 complaintsVehicle speed control
5 complaintsBody and structure
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaints
← All problems reported for the 2000 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