2021 Audi S4
Only 2 complaints on file — too few for a fair verdict.
This verdict reflects complaint volume compared to this model's typical year. Recalls and safety issues below apply regardless of the verdict — always check them.
Only 2 complaints on file — too few for a fair verdict. The data below is complete but unranked.
COMPLAINTS PER YEAR
View as data table
| Year | Complaints |
|---|---|
| 1989 | 0 |
| 1990 | 0 |
| 1991 | 0 |
| 1992 | 5 |
| 1993 | 16 |
| 1994 | 7 |
| 1995 | 1 |
| 1996 | 0 |
| 2000 | 143 |
| 2001 | 87 |
| 2002 | 22 |
| 2003 | 1 |
| 2004 | 29 |
| 2005 | 43 |
| 2006 | 30 |
| 2007 | 13 |
| 2008 | 4 |
| 2009 | 0 |
| 2010 | 60 |
| 2011 | 26 |
| 2012 | 22 |
| 2013 | 32 |
| 2014 | 17 |
| 2015 | 1 |
| 2018 | 7 |
| 2019 | 2 |
| 2020 | 16 |
| 2021 | 2 |
| 2022 | 1 |
KNOWN PROBLEM AREAS
Only 2 complaints on file for this model year -- too few to rank by share. Raw counts only, below.
1 of 2 total reports mentions: electrical system.
Show complaint excerpts
The contact owns a 2021 Audi S4. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of automotive power. The check engine warning light was illuminated.
NHTSA ODI report, 20250925
SAFETY TIMELINE
Volkswagen Group of America, Inc.
Remedy: Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L1.
Campaign 21V295000 — check if this car was fixed
Volkswagen Group of America, Inc.
Remedy: Dealers will inspect, and replace as necessary, the middle-rear seat belt assemblies, free of charge. Owner notification letters were mailed August 27, 2021.
Campaign 21V606000 — check if this car was fixed
Volkswagen Group of America, Inc.
Remedy: Dealers will inspect the rear axle, adjust the alignment as necessary, and replace any prematurely or unevenly worn tires, free of charge. Owner notification letters were mailed March 3, 2022.
Campaign 22V034000 — check if this car was fixed
Volkswagen Group of America, Inc.
Remedy: Dealers will update the infotainment unit software, free of charge. Owner notification letters were mailed October 25, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen's number for this recall is 91DZ.
Campaign 22V742000 — check if this car was fixed
BUY-SMART CHECKLIST
2021 Audi S4 — pre-purchase inspection
- Test/inspect for electrical system issues (1 reports on file for this year).
- Verify recall 21V295000 (suspension) has been completed.
- Verify recall 21V606000 (seat belts) has been completed.
- Verify recall 22V034000 (suspension, tires) has been completed.
- Verify recall 22V742000 (back over prevention) has been completed.
OTHER YEARS OF THIS MODEL
BEST YEARS
WORST YEARS
FAQ
Is the 2021 Audi S4 reliable?
There isn't enough NHTSA complaint data on file yet to give this model year a verdict.
What are the most common problems with the 2021 Audi S4?
The most-reported component is electrical system, accounting for 50% of complaints on file.
How many recalls does the 2021 Audi S4 have?
4 recalls on file for this model year.
Data updated 2026-07-11 · Complaints are unverified owner reports filed with NHTSA, not independently verified defects. Methodology.