Most common 2015 Audi S6 problems
Share of the 5 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Audi S6 complaints by model year
Best S6 years: 2007, 2009, 2011. Years to avoid: 2013, 2014, 2016, 1995. Compare all years →
2015 Audi S6 recalls (2)
Engine and engine cooling › Engine › Gasoline › Turbo/supercharger
Volkswagen Group of America, Inc. (Audi) is recalling certain 2013-2017 A8, S6 Sedan, S7, S8, and 2014-2017 RS7 vehicles. The turbocharger oil supply strainer can become blocked, causing wear to the bearings due to lack of lubrication.
Remedy: Dealers will replace the oil strainer and perform an oil change, free of charge. Owner notification letters were mailed August 4, 2022. Owners may contact Audi customer service at 1-800-253-2834.
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.
NHTSA defect investigations
Federal safety investigators have looked into 2 possible defects involving the 2015 Audi S6:
Engine Stall - Turbo Failure
On March 29, 2021, the Office of Defects Investigation (ODI) opened Preliminary Evaluation (PE) 21-009 after the agency received 58 reports alleging engine stalling in 2013-2016MY Audi vehicle models A8, S6, S7, S8 & RS7. The subject vehicles are equipped with 4.0L, twin-turbocharged engine. Complainants reported that the vehicles stall suddenly with no warning while driving on the highway or in city traffic.
Engine Stall - Turbo Failure
On March 29, 2021, the Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE 21-009) after the agency received 58 reports alleging engine stalling in 2013-2016MY Audi vehicle models A8, S6, S7, S8 & RS7 equipped with the 4.0L, twin-turbocharged engine. Complainants reported the vehicles would stall with no warning while driving at highway or city traffic speeds.
What 2015 Audi S6 owners say
Engine & cooling
Multiple turbo failures. Engine shook violently then suddenly stopped in the middle of the road. This same issue happened 3 times affecting both turbos. It may be due to faulty oil filter/strainer. From online research (link below) this is a common problem for C7 Audi s6. https://www.audizine.com/forum/showthread.php/[phone]-S6-4-0T-Turbo-Failure
Driving on the new jersey turnpike and both turbochargers failed. Car lost power and I had to steer to side of the highway without power steering and brakes from far left lane. Audi service says bearings starved of oil and seized. They said this is a common problem with the 4.0 twin turbo Audi engines and that the oil feed line gets blocked and starves the turbochargers of oil, resulting in bearing failure. Repair cost is $9,000. Car has less than 70,000 miles. Audi has a technical service bulletin on file with the NHTSA that specifically addresses this known problem. Audi north America will not assist with cost of repairs.
2015 Audi S6 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 4.0L 8-cyl turbo | 7-speed dual-clutch | AWD | 17 / 27 / 20 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2015 Audi S6 a good car?
Based on 5 owner complaints filed with NHTSA, the 2015 S6 rates few complaints: about as many complaints as a typical year of the S6 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 S6?
The engine & cooling — 3 complaints, 60% of all complaints for this model year. Next are the fuel & propulsion system (1) and electrical system (1).
How many recalls does the 2015 Audi S6 have?
There are 2 recalls for the 2015 Audi S6, the most recent from March 23, 2022 (turbo/supercharger). 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 S6?
The best years by complaints, compared at the same age, are 2007, 2009 and 2011. Years to avoid or approach with caution: 2013, 2014, 2016 and 1995. See the full Audi S6 years comparison.
At what mileage do 2015 Audi S6 problems happen?
The median mileage reported in complaints is about 70,000 miles; 50% 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.