Most common 2015 Audi A6 problems
Share of the 22 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Audi A6 complaints by model year
Best A6 years: 2022, 2018, 2011. Years to avoid: 2019, 2012, 2016, 1999, 1998. Compare all years →
2015 Audi A6 recalls (4)
Electrical system › Wiring
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2015-2016 Audi A6 Sedans and 2015 Audi A7 vehicles. The auxiliary heater electrical connector on these vehicles may have been incorrectly inserted into the auxiliary heater, possibly resulting in increased electrical resistance.
Remedy: Volkswagen will notify owners, and dealers will inspect the auxiliary heater connector, replacing the auxiliary heater and connector, as necessary, free of charge. The recall began March 15, 2019.
Air bags › Sensor › Occupant classification
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2018 Audi S6 and S7, 2012-2018 A7 and A6 Sedan, and 2014-2018 RS7 vehicles equipped with basic seats (with or without heating).
Remedy: Volkswagen will notify owners, and dealers will install a PODS system repair kit, free of charge. The recall began November 29, 2018. Owners may contact Audi customer service at 1-800-253-2834.
Engine and engine cooling › Cooling system
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2017 Audi A5 Cabriolet, A5 Sedan and Audi Q5 vehicles, 2012-2015 Audi A6 vehicles and 2013-2016 Audi A4 Sedan and A4 allroad vehicles.
Remedy: Audi will notify owners, and dealers will replace the pumps, free of charge. The recall began September 14, 2018. Owners may contact Audi customer service at 1-800-253-2834. Audi's number's for this recall is 19N3/19N4.
Engine and engine cooling › Cooling system
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2017 Audi A5, A5 Cabriolet and Q5 vehicles, 2013-2016 Audi Allroad and Audi A4 vehicles and 2012-2015 Audi A6 vehicles.
Remedy: Audi will notify owners, and dealers will update the software so that the power supply to the coolant pump is deactivated if the pump becomes blocked with debris, free of charge.
What 2015 Audi A6 owners say
Engine & cooling
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.
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.
Air bags
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.
I'm extremely frustrated and disappointed in our check and balances with Audi and these safety recalls. I own a 2015 Audi A6, back in June I found that there are two safety recalls with the front airbags that have killed 20 and injured over 100 people. I've done a lot of research. The airbags are more likely to explode in hot states and I'm located in socal, particularly the valley, which is the hottest part of la, reaching 100 degrees + throughout the summer. I've tried to resolve this with Audi, but the parts are not available and they have no idea when it will be available; the hope is October, but I was told August before. My passenger side airbag is often disabled automatically when there is a passenger in my car, the light comes on and off at the wrong times!!!. You can imagine how on edge I feel about driving around, going to work, having my child, or family in the car... …
Electrical system
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 was notified of safety recall 19n4 - disconnect electric coolant pump and had the recall service performed on 29 dec 2018. Owner was informed that an additional safety recall (19o2) will replace the coolant pump with a new one. On 04 March 2019, we called Audi USA and were told that the replacement was not yet available. The coolant pump also aids in providing additional cabin heat which is important during the winter months for the comfort and safety of occupants in the vehicle. Due to the pump being disconnected, the cabin has been very slow to warn, including the window defrosters. This presents an extreme safety issue especially during the winter months. It also presents a possible damage issue since the after coolant pump is used to alleviate heat from the turbocharger. Audi USA stated on 04 March 2019 that the new coolant pumps will be available sometime in the future.
2015 Audi A6 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.0L 6-cyl turbo diesel | 8-speed automatic | AWD | 24 / 38 / 29 |
| 2.0L 4-cyl turbo | CVT | FWD | 25 / 33 / 28 |
| 2.0L 4-cyl turbo | 8-speed automatic | AWD | 20 / 29 / 23 |
| 3.0L 6-cyl supercharged | 8-speed automatic | AWD | 18 / 27 / 21 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2015 Audi A6 a good car?
Based on 22 owner complaints filed with NHTSA, the 2015 A6 rates better than average: 44% fewer complaints than a typical year of the A6 at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2015 Audi A6?
The engine & cooling — 10 complaints, 45% of all complaints for this model year, most often about engine. Next are the air bags (4) and electrical system (3).
How many recalls does the 2015 Audi A6 have?
There are 4 recalls for the 2015 Audi A6, the most recent from December 5, 2018 (wiring). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Audi A6?
The best years by complaints, compared at the same age, are 2022, 2018 and 2011. Years to avoid or approach with caution: 2019, 2012, 2016, 1999 and 1998. See the full Audi A6 years comparison.
At what mileage do 2015 Audi A6 problems happen?
The median mileage reported in complaints is about 71,000 miles; 31% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.