Problems · NHTSA complaints

2015 Audi A6 problems

Owners filed 22 complaints about the 2015 Audi A6 with NHTSA between Apr 2015 and Jul 2026. The most-cited component is engine (6).

Complaints
22
Filed with NHTSA
Crashes
2
Reported by owners
Fires
0
Reported by owners
Injuries
1
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Engine6
  2. Air bags4
  3. Engine and engine cooling4
  4. Electrical system3
  5. Fuel/propulsion system2
  6. Service brakes2
  7. Steering2
  8. Wheels1
  9. Power train1
  10. Suspension1
  11. Other / unknown2

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Oct 29, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20152
20160
20172
20184
20193
20202
20210
20223
20233
20241
20250
20262

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Engine

6 reports
“Coolant sprayed on engine components due to leaking Coolant /Water pump. Coolant level is falling below minimum level - Problem confirmed by the dealer 1. Water pump 2. Coolant sprayed onto engine components - potential fire hazard 3. Confirmed by dealer 4. Unknown 5, Umknown”
Owner complaint to NHTSAFiled Nov 17, 2023EngineODI 11555740

Air bags

4 reports1 crash1 related recall
“The contact's sister owns a 2015 Audi A6. The contact stated that while his sister was driving 35 MPH, the vehicle crashed into the rear of a Toyota 4Runner. The driver sustained injuries to the chest and neck and had back pain. Medical attention was not provided. The front bumper and frame, and hood were damaged. The air bags failed to deploy. The vehicle was towed to a tow lot. There was no Police report filed. The drivers exchanged information. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 129,000.”
Owner complaint to NHTSAFiled Jul 24, 2026Air bagsCrash reportedODI 11752697

Engine and engine cooling

4 reports2 related recalls
“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.”
Owner complaint to NHTSAFiled Oct 16, 2024Engine and engine coolingODI 11620102

Electrical system

3 reports1 related recall
“The car will randomly die without notice and then will not start. There's an EC fault but no other identifiers and the car won't start for quite some time. After sitting for a couple hours or more it will finally start. It happens at a minimum of 1-2 times per month.”
Owner complaint to NHTSAFiled Jan 11, 2022Electrical systemODI 11447108

Fuel/propulsion system

2 reports
“P2067 engine check code which shows faulty fuel sensor. Audi has recalled other year Audi a6 sedan vehicles with the same issue and this seems to be a safety issue as it can show incorrect fuel gauge and in the event of car out of fuel, engine can stall and can cause accident.”
Owner complaint to NHTSAFiled Dec 31, 2023Fuel/propulsion systemODI 11562862

Service brakes

2 reports
“THE BRAKES ARE GRABBY AND WITH A GENTLE DEPRESSION OF THE BRAKE PEDAL THE CAR COMES TO A SUDDEN JERKY STOP. USUALLY HAPPENS FROM SLOWING DOWN FROM 10MPH TO 0MPH THE TRANSMISSION JERKS HARD WHEN SPEED DROPS FROM 15MPH THE ENGINE ERRONEOUSLY SHOWS CHECK ENGINE LIGHT DURING NORMAL DRIVING. CYLINDERS SHOW OIL LEAKAGE REPEATEDLY. THIS HAS BECOME A REPEAT ISSUE AND HAVE ASKED THE DEALER / SERVICE CENTER TO REPORT THIS AS A MANUFACTURING ISSUE”
Owner complaint to NHTSAFiled Dec 20, 2020Power train, Service brakes, EngineODI 11384223
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 29, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.