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Audi · Known Issues

2021 Audi RS7 Problems: 3 Known Issues

2021 model year · 384+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 384+ owner reports, the 2021 Audi RS7 has 3 documented known issues, with 1 rated critical. The most serious is 4.0T Twin-Turbo Coolant System Degradation ($900-$2,800 repair). The most commonly reported issue is 4.0T Carbon Deposit Accumulation with 260 owner reports. Across all issues with published estimates, repair costs range from $700 to $2,800. DIY maintenance guides at au7o.io.

In This Article

  • RS7 Cooling1
  • RS7 Engine1
  • RS7 Suspension1
  • Recalls3
  • FAQ
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In This Article

  • Cooling1
  • Engine1
  • Suspension1
  • Recalls3
  • FAQ

All 3 Known Issues

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ALL YEARS2026202520242023202220212020201920182017201620152014
Community reported
124 owners

On the 2014-2026 Audi RS7 4.0T, the RS7 4.0T V8 turbo coolant lines and connections degrade from thermal cycling. The high-performance application generates more heat than other 4.0T models, accelerating coolant line failure.

This issue also affects: Audi S7, Audi S8, Audi A8

Common Symptoms

  • Coolant seepage near turbos
  • Overheating during spirited driving
  • Low coolant warning
  • Sweet exhaust smell
  • Steam at shutdown
  • Coolant reservoir dropping

How to Fix

Replace turbo coolant lines proactively at 50,000 miles. Upgrade to silicone lines where possible.

Typical repair cost:$900 - $2,800

Research This Issue

Based on 124 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence124 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026
Community reported
260 owners

On the 2014-2026 Audi RS7 4.0T, the RS7 4.0T accumulates carbon on intake valves at an accelerated rate due to the performance tune. Deposit buildup reduces airflow and causes misfires, rough idle, and measurable power loss.

This issue also affects: Audi S8, Audi A4, Audi A1

Common Symptoms

  • Rough idle
  • Misfires on startup
  • Power loss at high RPM
  • Hesitation under load
  • CEL for lean condition
  • Turbo lag increase

How to Fix

Walnut blast every 30,000-40,000 miles. Install dual catch can setup for both turbo sides.

Typical repair cost:$700 - $1,500

Research This Issue

Based on 260 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence260 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026

On the 2021-2025 Audi RS7, audi TSB 2059363/6 applies to air-suspension-equipped 2021-2025 RS7 vehicles when the instrument cluster reports an air-suspension malfunction and suspension control unit J775 stores C1260F0 (no communication) or U112100 (missing message), both with symptom code 262400. The bulletin identifies communication between J775 and compressor-control unit J1135; it does not establish a universal air-strut, compressor or complete-system wear failure.

This issue also affects: Audi e-tron, Audi A8, Audi Q8

Common Symptoms

  • Air-suspension malfunction warning in the instrument cluster

How to Fix

Inspect the wiring and connectors between J775 and J1135 before replacing a component. For a first passive/sporadic occurrence, clear the fault and release the vehicle. If the fault is active/static after wiring and connector inspection, or the same passive/sporadic fault returns a second time, replace J1135 using current Audi repair and parts information. Audi notes that improved J1135 software remains under development.

Research This Issue

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Manually Verified
High ConfidenceVerifiedReviewed Jul 2026
NHTSA Recalls3 recalls

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

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.

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Frequently Asked Questions

What are the most common Audi RS7 problems?

According to Au7o's analysis of 384+ owner reports, the 2021 Audi RS7 has 3 documented issues. The most frequently reported are: 4.0T Twin-Turbo Coolant System Degradation, 4.0T Carbon Deposit Accumulation, 2021-2025 RS7 Air-Suspension J1135 Communication Fault - TSB 2059363/6. Of these, 1 is rated critical and should be addressed promptly.

Is the Audi RS7 reliable?

The 2021 Audi RS7 has 3 known issues documented across 384+ owner reports. 1 issue is rated critical: 4.0T Twin-Turbo Coolant System Degradation. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Audi RS7 problems?

Repair costs for known Audi RS7 issues range from $700 to $2,800, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 4.0T Twin-Turbo Coolant System Degradation, typically costs $900-$2,800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2014-2026 Audi RS7 4.0T Twin-Turbo Coolant System Degradation?

The RS7 4.0T V8 turbo coolant lines and connections degrade from thermal cycling. The high-performance application generates more heat than other 4.0T models, accelerating coolant line failure. Repairs typically run $900-$2,800. Severity: high.

What is the 2014-2026 Audi RS7 4.0T Carbon Deposit Accumulation?

The RS7 4.0T accumulates carbon on intake valves at an accelerated rate due to the performance tune. Deposit buildup reduces airflow and causes misfires, rough idle, and measurable power loss. Repairs typically run $700-$1,500. Severity: medium.

What is the 2021-2025 Audi RS7 2021-2025 RS7 Air-Suspension J1135 Communication Fault - TSB 2059363/6?

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 384+ owner reports, NHTSA recalls, TSBs, and automotive forums.

Campaign #22V15500014/03/2022

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

Audi TSB 2059363/6 applies to air-suspension-equipped 2021-2025 RS7 vehicles when the instrument cluster reports an air-suspension malfunction and suspension control unit J775 stores C1260F0 (no communication) or U112100 (missing message), both with symptom code 262400. The bulle… Severity: medium.