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Audi · Known Issues

2019 Audi S6 Problems: 1 Known Issue

2019 model year · 294+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 294+ owner reports, the 2019 Audi S6 has 1 documented issue. None of the listed issues is rated critical; this is not a complete reliability assessment. The most commonly reported issue is 4.0T Direct Injection Carbon Buildup with 294 owner reports. Across all issues with published estimates, repair costs range from $600 to $1,400. DIY maintenance guides at au7o.io.

In This Article

  • S6 Engine1
  • Recalls11
  • FAQ
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In This Article

  • Engine1
  • Recalls11
  • FAQ

All 1 Known Issue

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Community reported
294 owners

On the 2013-2024 Audi S6 4.0T, the S6 4.0T twin-turbo V8 develops carbon deposits on all eight intake valves. The twin-turbo layout and high heat make carbon accumulation aggressive, with symptoms appearing as early as 30,000 miles.

This issue also affects: Audi RS7, Audi S7, Audi S8

Common Symptoms

  • Rough idle
  • Misfires
  • Power loss
  • Hesitation at low RPM
  • Check engine light
  • Uneven cylinder performance

How to Fix

Walnut blast all eight intake runners. Dual-injection models (2019+) are less affected.

Typical repair cost:$600 - $1,400

Research This Issue

Based on 294 owner reports

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Community Reported
High Confidence294 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026
NHTSA Recalls11 recalls

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."

Campaign #25V90000019/12/2025

EQUIPMENT:ELECTRICAL:INFOTAINMENT:VIDEO (TOUCH)SCREEN/MONITOR/UNIT

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021-2022 AUDI A8, A6 Allroad, E-TRON Quattro, 2022 S3, RSQ8, RS7, RS6 Avant, Q8, Q7, Q3, E-TRON Sportback Quattro, S5 Cabriolet, E-TRON GT, S5 Sportback, A7, A6, A5 Sportback, A5 Cabriolet, A4, A4 Allroad, A3, S8, SQ7, SQ8, S6, and S4 vehicles. The infotainment main unit may become damaged internally when the vehicle is shut off, resulting in an inoperative rearview camera display the next time the vehicle is started. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Campaign #22V80600026/10/2022

ELECTRICAL SYSTEM

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Other Audi Models

Audi R830Audi Q329Audi A427Audi A623Audi S722Audi S419

Frequently Asked Questions

What are the most common Audi S6 problems?

According to Au7o's analysis of 294+ owner reports, the 2019 Audi S6 has 1 documented issue. The documented issue is: 4.0T Direct Injection Carbon Buildup. None are rated critical, but regular maintenance is recommended.

Is the Audi S6 reliable?

The 2019 Audi S6 has 1 known issue documented across 294+ owner reports. None of the matching records is rated critical; this is not a complete reliability assessment. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Audi S6 problems?

Repair costs for known Audi S6 issues range from $600 to $1,400, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2013-2024 Audi S6 4.0T Direct Injection Carbon Buildup?

The S6 4.0T twin-turbo V8 develops carbon deposits on all eight intake valves. The twin-turbo layout and high heat make carbon accumulation aggressive, with symptoms appearing as early as 30,000 miles. Repairs typically run $600-$1,400. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 294+ owner reports, NHTSA recalls, TSBs, and automotive forums.

Volkswagen Group of America, Inc. (Audi) is recalling certain 2020-2022 Audi S7, S6 Sedan, A6 Allroad, 2021-2022 RS7, RS6 Avant, 2019-2022 A7, and A6 Sedan vehicles. Liquid spilled in the rear seat may penetrate and cause the gateway control module to shut down.

Campaign #22V86100021/11/2022

ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021-2022 RS6 Avant and RS7, 2020-2022 A6 Allroad, S6 Sedan, and S7, and 2019-2022 A6 Sedan and A7 vehicles. The fuel level sender may stick, causing an inaccurate fuel level reading to be displayed on the instrument cluster.

Campaign #22V15500014/03/2022

SEAT BELTS:REAR/OTHER:RETRACTOR

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021 Volkswagen ID4, Audi A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A5 Sportback, A6 Allroad, A6 Sedan, A7, A8, E-Tron Quattro, E-Tron Sportback Quattro, Q3, Q5, Q5 Sportback, Q7, Q8, RS5 Sportback, RS5 Coupe, RS6 Avant, RS7, RSQ8, S4 Sedan, S5 Cabriolet, S5 Coupe, S5 Sportback, S6 Sedan, S7, S8, SQ5, SQ5 Sportback, SQ7, SQ8, and 2021-2022 S3 Sedan vehicles. The rear seat belt automatic locking retractors may deactivate early, which can prevent the child restraint system from securing properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."

Campaign #21V60600005/08/2021

+ 6 more recalls. Check all on NHTSA.gov

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