DecodedCars2025 Audi S6
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2025 models.
- Class
- Midsize Cars
- Body styles
- 4dr Sedan
- Engines
- 2.9L 6-cyl
- Horsepower
- 444–670 hp
- Transmission
- automatic
- Drivetrain
- All-Wheel Drive
- Fuel
- Hybrid
- MPG (best)
- 22 combined · 19 city / 27 hwy
- Length
- 194.9 in
- Curb weight
- 4,495 lb
- NHTSA rating
- Not rated
- Recalls
- 3 campaigns
Pros & cons
What's good
- Strong performanceUp to 670 hp, versus about 320 hp for similar 2025 models.
- Hybrid version availableOffered as a hybrid as well as gas.
- Lots of standard safety tech4 of 5 key driver aids standard on the versions we checked.
Watch out for
- Below-average fuel economyBest version gets 22 MPG combined, 27% below the 2025 midsize car average of 30 MPG.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Calculated from EPA, NHTSA and vPIC data against 34 similar 2025 models — not a review. How we calculate this →
Overview
The 2025 Audi S6 is a midsize car offered with a 2.9L 6-cyl engine, including a hybrid version and all-wheel drive.
It measures about 195 inches long and 74 inches wide on a 115-inch wheelbase, with a curb weight of roughly 4,495 lb.
EPA rates its most efficient version at 22 MPG combined (19 city / 27 highway), 27% worse than the 2025 midsize car average of 30 MPG, for an estimated $3,750 a year in fuel.
NHTSA has not published a 5-Star overall rating for this model year.
It has 3 recall campaigns on file and owners have filed 4 complaints with NHTSA since 2015, most often about the electrical system.
What changed for 2025
No changes to engines, powertrains, drivetrains, size, EPA ratings or NHTSA crash rating compared with the 2024 S6 — a carry-over year in the data.
Compared with 2024; trim, feature and price changes aren't covered. See the 2024 S6 →
Trims, performance & features
Trims
Safety & driver-assist features
Built in: Heilbron, Baden-WüRttemberg · Ingolstadt, Bavaria · Neckarsulm, Baden-WüRttemberg
NHTSA vPIC, as reported by the manufacturer for 4 2025 S6 configurations; may not list every trim. How we calculate this →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| 4dr Sedan | 194.9 in | 74.4 in | 57.1 in | 115.4 in | 63.8 / 63 in | 4,495 lb |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| S6 Hybrid | 2.9L 6-cyl | Automatic (S8) | All-Wheel Drive | 19 / 27 / 22 | -27% | $3,750 | 408 |
EPA estimates; "vs. class" is combined MPG against the 2025 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2025 Audi S6.
Similar 2025 midsize cars
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2025 Audi S6 (this car) | 22 MPG | Not rated | 3 |
| 2025 BMW 3 Series | 31 MPG | Not rated | 0 |
| 2025 BMW 5 Series | 31 MPG | Not rated | 0 |
| 2025 Mercedes-Benz E-Class | 28 MPG | Not rated | 0 |
| 2025 Lexus IS | 25 MPG | Not rated | 0 |
| 2025 Audi A4 | 29 MPG | Not rated | 0 |
| 2025 Mercedes-Benz C-Class | 29 MPG | Not rated | 0 |
Recalls (3)
Back Over Prevention › Sensing System › Camera · Dec 19, 2025
NHTSA campaign 25V900000 · 356,894 vehicles
- Problem
- 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.
- Fix
- 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.
Seat Belts › Rear/Other › Retractor · Dec 19, 2025
NHTSA campaign 25V899000 · 27,768 vehicles
- Problem
- Volkswagen Group of America, Inc. (Audi) is recalling certain 2025 SQ6 E-Tron, SQ6 Sportback E-Tron, Q6 Sportback E-Tron, A6, A5, A6 Sportback E-Tron, Q6 E-Tron, S5, and S6 Sportback E-Tron vehicles. The automatic locking retractor may fail to engage when a child seat is installed using the seat belt. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 208, "Occupant Crash Protection" and 209, "Seat Belt Assemblies."
- Risk
- An improperly secured child seat can increase risk of injury during a crash.
- Fix
- Dealers will inspect and replace the right and left rear seat belt assembly as necessary, free of charge. Owner notification letters were mailed February 16, 2026. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 69D8. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on December 23, 2025.
Seat Belts › Front › Retractor · Sep 24, 2025
NHTSA campaign 25V638000 · 1,042 vehicles
- Problem
- Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2025 GTI, Golf R, Audi A5, A6 Sportback E-Tron, S5, S6 Sportback E-Tron, 2026 Q4 Sportback E-Tron, and Q4 E-Tron vehicles. The torsion bar in one or both front seat belt retractors may have been damaged during production.
- Risk
- In a crash, a damaged torsion bar in a retractor could fail. If this happens, the seat belt may not properly restrain an occupant during a crash, increasing the risk of injury.
- Fix
- Dealers will replace one or both front seat belts, free of charge. Owner notification letters were mailed October 30, 2025, and October 31, 2025. Owners may contact Audi at 1-800-253-2834 or Volkswagen at 1-800-893-5298. Audi's number for this recall is 69UM; Volkswagenâs number for this recall is 694T. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning September 26, 2025.
Not every 2025 Audi S6 is affected — only a VIN check confirms your car.
Owner-reported problems
Unverified owner reports; best-sellers collect more.
Used 2025 Audi S6 buyer's checklist
- Run the VIN at nhtsa.gov/recalls. 3 recalls this year — ask for proof of repairs.
- Electrical System — 3 owner reports. Test every window, lock, light, screen and USB port; check the battery age.
- Lane Departure — 1 owner reports. Make sure driver-assist systems and the backup camera work without error messages.
- Forward Collision Avoidance › Warnings — 1 owner reports. Make sure driver-assist systems and the backup camera work without error messages.
- Hybrid system. Check for hybrid-system warning lights and ask whether the high-voltage battery has been replaced or is still under warranty.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2025 Audi S6. Not a substitute for a professional inspection.
Other S6 years
Compare all years →| Year | MPG (best) | Length | Overall | Recalls | Complaints |
|---|---|---|---|---|---|
| 2024 S6 | 22 | 194.9 in | Not rated | 1 | 0 |
| 2023 S6 | 22 | 194.9 in | Not rated | 1 | 0 |
| 2022 S6 | 22 | 194.9 in | Not rated | 4 | 4 |
| 2021 S6 | 22 | 194.9 in | Not rated | 10 | 0 |
| 2020 S6 | 22 | 194.9 in | Not rated | 6 | 2 |
| 2018 S6 | 18 | 193.7 in | ★★★★★ | 1 | 4 |
| 2017 S6 | 21 | 193.7 in | Not rated | 2 | 5 |
| 2016 S6 | 21 | 193.7 in | Not rated | 2 | 19 |
| 2015 S6 | 20 | 193.7 in | Not rated | 2 | 5 |
| 2014 S6 | 20 | 193.7 in | Not rated | 3 | 19 |
| 2013 S6 | 20 | 193.7 in | Not rated | 3 | 41 |
| 2011 S6 | 16 | 193.7 in | Not rated | 2 | 0 |
Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or Audi. How we calculate this →