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Engine coolingPart report

2015 Audi A6 Engine cooling Problems

Complaints
4about this part
Share
18%of 22 total for the year
Median mileage
79,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the engine cooling of the 2015 Audi A6, 18% of the 22 complaints for this model year. Where a mileage was given, the median is 79,000 miles. 2 recall campaigns on record are filed under a similar system.

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.

“The contact owns a 2015 Audi A6. The contact stated that while driving on neighborhood roads at approximately 25 MPH, the coolant warning light was illuminated. The contact proceeded to park on the side of the road and walk to her residence to pick up coolant to refill the coolant tank. The vehicle was then taken to the independent mechanic where it was diagnosed that the coolant tank needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 79,000.”

NHTSA complaint #11620102, filed 2024-10, 79,000 miles

“The contact owns a 2015 Audi A6. The contact stated while driving 65 MPH, the oil warning light illuminated. The contact veered to the side of the road and called for roadside assistance. The vehicle was towed to a local dealer to be diagnosed. The contact was informed that the oil level was extremely low due to an oil leak. The contact was informed that the timing chain kit and camshaft cover needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 85,000.”

NHTSA complaint #11455029, filed 2022-03, 85,000 miles

“The contact owns a 2015 Audi A6. The contact stated that while the vehicle was parked, there was antifreeze leaking underneath the vehicle. The contact stated that the leak was a recurring failure. The contact stated that after starting the vehicle, the Turn Off Engine, Check Coolant Level message was displayed. The vehicle was taken to a local dealer and the coolant pump was replaced under NHTSA Campaign Number: 18V229000 (Engine and Engine Cooling). The vehicle was repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 78,000.”

NHTSA complaint #11500532, filed 2023-01, 78,000 miles

Related recalls

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 2015 Audi A6

Engine
6 complaints
Air bags
4 complaints
Electrical system
3 complaints
Brakes
2 complaints
Fuel system
2 complaints
Other or unknown
2 complaints
Steering
2 complaints
Suspension
1 complaints
Transmission and drivetrain
1 complaints
Wheels
1 complaints

← All problems reported for the 2015 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