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Engine coolingPart report

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 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
202116%
201624%
2015418%
201412%
201312%
201235%
2010212%
200834%
200736%
200623%
200533%
200439%
200335%
20021517%
20011816%
20002114%
1999178%
199865%
199715%
199624%
199516%

Other parts of the 2000 Audi A6

Electrical system
36 complaints
Brakes
29 complaints
Fuel system
23 complaints
Tires
14 complaints
Suspension
12 complaints
Steering
11 complaints
Air bags
8 complaints
Transmission and drivetrain
8 complaints
Other or unknown
6 complaints
Vehicle speed control
5 complaints
Body and structure
4 complaints
Visibility (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