2021 Audi S6 Problems, Recalls & Reliability
Verdict
No verdictComplaint Index
8/100
#13 most-complained of 14 S6 years
The 2021 Audi S6 has 0 NHTSA complaints and a complaint index of 8, the second-lowest among 14 model years with data. It carries 10 recalls, more than most other S6 years, covering electrical, brake, and camera systems, but none are do-not-drive recalls.
- Complaints
- 0
- Recalls
- 10
- Crashes / fires
- 0 / 0
- Injuries / deaths
- 0 / 0
- NHTSA overall rating
- Not rated
- EPA combined MPG
- 22
- 18 city / 28 hwy
Top 2021 Audi S6 problems
NHTSA owner complaints by component group. Groups with 15+ complaints have their own page.
No component data.
2021 Audi S6 recalls
10 NHTSA recall campaigns list this model year.
- NHTSA 25V900000Dec 19, 2025Collision Avoidance & Cameras356,894 vehicles
Back over prevention: sensing system: camera
Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2026 vehicles. Please see the recall report for a complete list of models. A software error may prevent the rearview camera image from displaying as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Risk: A rearview image that does not display reduces the driver's view behind the vehicle, increasing the risk of a crash.
Remedy: Dealers will update the software, free of charge. Owner notification letters were mailed January 14, 2026. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90TV. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on December 23, 2025.
- NHTSA 25V201000Mar 31, 2025Electrical System44,387 vehicles
Electrical system:software
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 SQ8, A6 SEDAN, A7, A8, Q7, Q8, RS6 Avant, RS7, RSQ8, S6 SEDAN, S7, S8, A6 Allroad, and SQ7 vehicles. Due to a software error, the instrument panel display may fail.
Risk: An instrument panel display that fails to show critical safety information, such as the speedometer or warning lights, increases the risk of a crash.
Remedy: Dealers will update the instrument panel module software, free of charge. Owner notification letters were mailed April 24, 2025. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90VC.
- NHTSA 23V601000Aug 25, 2023Brakes7,499 vehicles
Service brakes, hydraulic:fluid
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi S7, S6 Sedan, RS7, RS6 Avant, A6 Allroad, 2019-2021 A7, and A6 Sedan vehicles. An incorrectly labeled brake fluid cap may have been installed, which can result in the use of the wrong type of brake fluid.
Risk: Incorrect brake fluid can reduce braking ability and increase the risk of a crash.
Remedy: Dealers will inspect the brake fluid reservoir cap and, if necessary, replace it, free of charge. Owner notification letters are expected to be mailed October 17, 2023. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen's number for this recall is 47T9.
2021 Audi S6 fuel economy and fuel cost
- City
- 18 MPG
- Highway
- 28 MPG
- Combined
- 22 MPG
- Annual fuel cost (EPA)
- $3,650
- 15,000 mi/yr
- Fuel
- Premium
- Current regular gas
- $4.32/gal
- national avg.
EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.
2021 compared with other S6 years
Frequently asked questions
- Is the 2021 Audi S6 reliable?
- NHTSA lists 0 owner complaints for the 2021 Audi S6 and a complaint index of 8, ranked 13th out of 14 model years, meaning it has one of the lowest complaint levels among S6 years.
- How many recalls does the 2021 Audi S6 have?
- The 2021 Audi S6 has 10 recalls on file with NHTSA, covering areas including electrical system, brakes, collision avoidance cameras, and seat belts. None are classified as do-not-drive recalls.
- What year Audi S6 should I avoid?
- Based on NHTSA complaint index data, the 2013 model year (complaint index 100), 2014 (92), and 2016 (85) are marked Avoid, while 2021 has a much lower index of 8.
- What is the fuel economy of the 2021 Audi S6?
- The EPA rates the 2021 Audi S6 at 22 mpg combined, 18 mpg city and 28 mpg highway, with an estimated annual fuel cost of $3,650.
- Does the 2021 Audi S6 have a brake recall?
- Yes. Recall 23V601000 covers an incorrectly labeled brake fluid cap that could be installed on certain 2021 Audi S6 Sedan vehicles, among other Audi models.