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2021 Audi S6 Report

Known issues, recalls, running costs, and what to check before you buy.

Updated Jun 2, 2026·Daniel Wilson·5 Critical Recalls
2021 Audi S6 Report

Overall Score

6.1/ 10
Our Verdict
Proceed with caution

Key Takeaways

  • The 2021 Audi S6 has a significant number of recalls (57), with a notable focus on safety systems such as airbags and seat belts.
  • While owner complaints are zero, the high recall volume indicates potential for early-life issues that require verification of manufacturer remedies.
  • The 2.9L V6 engine requires premium fuel and produces 444 horsepower, offering strong performance for its class.
  • Fuel economy is rated at 22 MPG combined, which is average for a performance sedan, but expect higher fuel costs.
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OverviewWho This Car Is ForReliability & ProblemsVehicle SpecsUnlock Full ReportFAQ
Overview

2021 Audi S6

The 2021 Audi S6 presents a compelling blend of luxury and performance, powered by a 2.9-liter V6 engine delivering 444 horsepower and 443 lb-ft of torque. Its all-wheel-drive system and automatic transmission ensure confident handling in various conditions. However, prospective buyers should be aware of a significant number of recalls, primarily related to safety components like airbags and seat belts. While there are no logged complaints, the high recall count suggests potential for early-life critical failures, making a detailed inspection crucial.

Critical Failure Risk

Recalls indicate potential issues with rear axle lock nuts, which could lead to alignment problems or uneven tire wear if not addressed. This is a safety-critical component impacting suspension integrity.

Early detection can help you avoid a $500-$1,500 repair.

Open Maintenance Analysis →

Safety & Bulletins

Open Recalls57
Service Bulletins0
Full Recall History →

Owner Complaints

0

No primary complaint themes found.

Detailed Issue Breakdown →

Performance & Efficiency

Horsepower
444HP
Torque
443 lb–ftLB-FT
Fuel Efficiency
Combined
22
MPG
City
18
MPG
Highway
28
MPG
Full Vehicle Specifications ↓

Reliability

6.8/ 10

Practicality

5.7/ 10

The score is mainly limited by high fuel consumption.

Buyer Fit

Who This Car Is For

Best for

Enthusiasts seeking a blend of luxury, performance, and all-wheel-drive capability.

+2 more buyer-fit notes in the full report

Avoid if

Drivers prioritizing absolute long-term reliability with minimal potential for unexpected repairs.

+2 more buyer-fit warnings in the full report

2021 Audi S6 Reliability Analysis

Explore comprehensive reliability data including official safety recalls, consumer complaints, and common mechanical failures for the 2021 Audi S6.

  • Recall TimelineOfficial safety notices
  • Owner ComplaintsReal driver reports
  • Failure AnalysisKnown part defects
Specs

Vehicle Specs

Fuel Type
Premium
Seating Capacity
5
Horsepower
444 hp
Torque
443 lb-ft
Transmission
Automatic
Drivetrain
AWD/All-Wheel Drive
Body Style
Sedan
MSRP Range
$75,445 - $82,145
EPA Combined MPG
22

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Most Common Issues

1. Rear Axle Lock Nut Failure

Most reported

Usage data observed

2. Airbag System Malfunction

Usage data observed

See all common issues in the maintenance guide

First Service Interval

- Oil Change (5W-40 Synthetic) (Parts: 5W-40 Synthetic Engine Oil, Oil Filter) - Tire Rotation and Inspection - Brake System Inspection - Cabin Air Filter Replacement

Est. shop cost: $150 - $300

10,000 mi

Unlock the full maintenance guide for every scheduled service interval and cost forecast.

Full pre-purchase inspection checklist
Complete maintenance schedule (6 service intervals)
Repair forecasts with mileage and cost context
Full buyer-fit guidance and who should avoid it
Full specs and trim-level context
57 recall campaign details & remedy notes
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FAQ

FAQ

Is the 2021 Audi S6 reliable?▾

The CarFocal Reliability Score for the 2021 Audi S6 is 6.8/10. Reliability score is 6.8/10. NHTSA recalls: 57. Owner complaints: 0.

How practical is the 2021 Audi S6 for daily use?▾

Practicality score is 5.7/10. The score is mainly limited by high fuel consumption. EPA combined economy is 22 MPG. Seating capacity is 5. 4 passenger doors are listed. Boot capacity is 520 litres.

What is the overall score for the 2021 Audi S6?▾

The CarFocal Overall Score for the 2021 Audi S6 is 6.1/10. Overall score is 6.1/10 (Mixed). Confidence 55%. Maintenance 6.5/10. Practicality 5.7/10.

What does it cost to own and maintain a 2021 Audi S6?▾

Based on Carfocal's data, First listed service: - Oil Change (5W-40 Synthetic) (Parts: 5W-40 Synthetic Engine Oil, Oil Filter) - Tire Rotation and Inspection - Brake System Inspection - Cabin Air Filter Replacement at 10,000 miles. Estimated first-year maintenance: $1,200 - $2,000. Repair prediction highlight: Rear Axle Lock Nut (typical at 50,000 miles, estimated cost Min: $500 • Max: $1,000).

What is the MSRP range for the 2021 Audi S6?▾

MSRP range is $75,445 - $82,145.

What engine is in the 2021 Audi S6?▾

Engine specs list V6 • 6 • 2.9. Output is 444 hp • 443 lb-ft.

What transmission does the 2021 Audi S6 use?▾

According to CarFocal's specs for the 2021 Audi S6, transmission is Automatic. The paired drivetrain is AWD/All-Wheel Drive.

Does the 2021 S6 require Premium gas?▾

Manufacturer fuel recommendation: Premium.

What is the combined EPA MPG for the 2021 Audi S6?▾

EPA combined estimate is 22 MPG.

What driver assistance and safety features are available on the 2021 Audi S6?▾

11 standard and 3 optional driver assistance features. Key features include Anti-lock Braking System, Electronic Stability Control, Traction Control.

What is the fuel economy range for the 2021 Audi S6?▾

According to CarFocal's specs for the 2021 Audi S6, fuel economy range is 18-28 mpg combined.

How many people fit in a 2021 Audi S6?▾

According to CarFocal's specs for the 2021 Audi S6, seating capacity is 5.

What body style is the 2021 Audi S6?▾

According to CarFocal's specs for the 2021 Audi S6, body style is sedan.

What drivetrain does the 2021 Audi S6 use?▾

According to CarFocal's specs for the 2021 Audi S6, drivetrain is AWD/All-Wheel Drive. Transmission is Automatic.

What are the NHTSA safety ratings for the 2021 Audi S6?▾

NHTSA ratings: Rollover 5/5.

Are there open safety recalls on the 2021 Audi S6?▾

This model year has 57 official safety campaigns listed.

Should buyers consider alternatives to the 2021 Audi S6?▾

Alternatives listed in this guide: 2021 Mercedes-Benz E-Class and 2021 Audi A6.

Start Here

Maintenance guide

Costs + intervals

Recall report

Campaigns + remedy notes

Owner complaints

Issue volume + categories

In this guide

  1. 01Overview
  2. 02Who This Car Is For
  3. 03Reliability & Problems
  4. 04Vehicle Specs
  5. 05Unlock Full Report
  6. 06FAQ

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