2021 AUDI S4

Recalls, Specs & Safety Report

4RecallsNHTSA Verified2ComplaintsNHTSA Data1InvestigationsNHTSA Data
Expert Verdict
ℹ️Average Safety Profile

This 2021 model shows average reliability, primarily driven by 4 recalls affecting the seat belts system.

Key Factor:seat belts recalls

πŸ“‹Why This Matters

Understanding recall history helps predict future ownership costs. Each unaddressed issue represents potential repair expenses.

Insurance companies review vehicle reliability data when setting premiums. Models with elevated recall rates often see adjusted pricing.

Focus Area:general reliability
πŸ“Š

Expert Analysis

  • πŸ“ˆ
    Recall Trend:No Change in recalls
  • ⚠️
    Primary Risk Area:Hesitate
  • βš–οΈ
    Vs Brand: Worse than avg (1.8)
    πŸ“
    Summary:
Critical Component: Hesitate

Safety & Reliability Score

63/100
Average

Score Breakdown

Recall Impact-32
Complaint Impact-0.1
Investigation Impact-5

Technical Specifications

Key specifications for the 2021 AUDI S4

Model Year2021
MakeAUDI
ModelS4
Fuel TypeGasoline
Body ClassPassenger Vehicle

Safety History Timeline

Scroll for more β†’
Jan21
NEWProduction
Jan21
RECALLRecall Issued
Jan21
RECALLRecall Issued
May21
RECALLRecall Issued
May22
RECALLRecall Issued
Jan23
ISSUEFirst Report
Apr23
INVInvestigation Opened

Consumer Complaint Analysis

⚠️

Most Reported Issue

1 complaints (50% of total)
➑️

Complaint Trend

Stable
No trend data
βœ…

Safety Incidents

No critical incidents

Complaint Severity Distribution

Breakdown of 2 consumer complaints by severity level.

🟒Low
2(100%)
βœ…Good News: No critical or high-severity complaints reported for this vehicle.

Mileage Failure Analysis

βš™οΈEngineering Insight

Based on consumer reports, issues for this vehicle tend to peak around the 20k-40k mileage range. The average reported failure mileage is 31,000 miles.

πŸ“Š Mileage data extracted from 1 of 2 complaints (50% coverage)
0-20k
0 reports (0%)
20k-40k
1 reports (100%)
40k-60k
0 reports (0%)
60k-80k
0 reports (0%)
80k-100k
0 reports (0%)
100k+
0 reports (0%)
* Analysis based on mileage data extracted from consumer complaint descriptions. Actual failure rates may vary.

πŸ› οΈ DIY Diagnosis Center

Experiencing an issue? Select a symptom to find official manufacturer solutions (TSBs).

Primary Risk Areas

SEAT BELTSTIRESSUSPENSIONBACK OVER PREVENTION

Official Safety Recalls (4)

Campaign: 21V606000

SEAT BELTS:REAR/OTHER:RETRACTOR

Summary

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."

Consequence

An unsecured child restraint system can increase the risk of injury during a crash.

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. Owners may contact Volkswagen customer service at 1-800-893-5298 and Audi customer service at 1-800-253-2834. Volkswagen's numbers for this recall are 69CR (VW) and 69CS (Audi).

Additional Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Manufacturer: Volkswagen Group of America, Inc.

Campaign: 22V034000

TIRES

Summary

Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2021 Audi A5 Sportback, RS5 Coupe, RS5 Sportback, S5 Sportback, 2020-2021 A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A6 Allroad, A6 Sedan, A7, A8, Q5, S4 Sedan, S5 Coupe, S5 Cabriolet, S6 Sedan, S7, S8, SQ5, 2021 Q5 Sportback, Q7, Q8, RS6 Avant, RS7, RSQ8, SQ5 Sportback, SQ7, and SQ8 vehicles. The rear axle alignment may not have been inspected after the repairs for Recall 21V-295 (42L1) were performed.

Consequence

Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash.

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. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L5.

Additional Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Manufacturer: Volkswagen Group of America, Inc.

Campaign: 21V295000

SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY

Summary

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Q7, Q8, Q5 Sportback, SQ5 Sportback, RS6 Avant, RS7, RS Q8, 2020-2021 Audi S6 sedan, Q5, A8, S8, A7, A6 Allroad, A5 Cabriolet, A4 sedan, A4 Allroad, SQ5, S7, A6 sedan, S5 coupe, S4 sedan, S5 Cabriolet, A5 coupe, 2019-2021 RS5 coupe, A5 Sportback, S5 Sportback, RS5 Sportback vehicles. The lock nut on the trailing arm of the rear axle may break due to stress corrosion.

Consequence

A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.

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.

Additional Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Manufacturer: Volkswagen Group of America, Inc.

Campaign: 22V742000

BACK OVER PREVENTION:DISPLAY FUNCTION

Summary

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021 Audi A8, RS7, RS6 Avant, RS5 Sportback, RS5 Coupe, Q8, Q7, Q5 Sportback, S4 Sedan, Q5, A7, A6, A6 Allroad, A5 Sportback, A5 Coupe, A5 Cabrioleet, A4 Sedan, A4 Allroad, E-Tron Sportback Quattro, SQ7, S5 Cabriolet, E-Tron Quattro, SQ8, SQ5 Sportback, SQ5, S8, S7, S6 Sedan, S5 Sportback, S5 Coupe, 2022 E-Tron GT, and 2021-2022 RSQ8 vehicles. Due to a software issue, a blank or black screen may be displayed instead of the rearview camera image when the vehicle is placed in reverse gear. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Consequence

A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.

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.

Additional Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Manufacturer: Volkswagen Group of America, Inc.

NHTSA Investigations

1 investigation

Official NHTSA safety investigations for 2021 S4.

INV-2021-1000🟒 Closed

NHTSA opened investigation after receiving consumer complaints regarding S4 performance issues.

Opened: Affected Units: 35,388

Consumer Complaints

2 total complaints

Consumer-reported issues submitted to NHTSA for 2021 S4.

Common Reported SymptomsAI Analysis

Hesitate50%
Check Engine Light50%
Warning50%
Display50%
ElectricalπŸ”΅ Low
ELECTRICAL SYSTEM

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. The message "Drive System Malfunction - Please Contact Service" was displayed. In addition, the vehicle hesitated to restart and shift into gear as intended. The contact stated that the failure had progressed over time. The vehicle was taken to a local dealer, where it was diagnosed with needing a pending software service update; however, the repairs would not be available until the end of 2025. The manufacturer was made aware of the failure. The failure mileage was approximately 31,000.

Sep 25, 2025Under Review
OtherπŸ”΅ Low
UNKNOWN OR OTHER

2021 AUDI S4. CONSUMER WRITES IN REGARD TO NHTSA SAFETY RECALL 22V-742. THE CONSUMER IS DISGUSTED AND DISATISFIED WITH THE AUDI SERVICE DEPARTMENT PROCEDURES FOR PERFORMING THE RECALLS.

Jan 31, 2023Resolved

Frequently Asked Questions

Are there any recalls for the 2021 AUDI S4?

Yes, the 2021 AUDI S4 has 4 recorded recalls from NHTSA. These recalls cover various components including SEAT BELTS:REAR/OTHER:RETRACTOR, TIRES, SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY.

Is the 2021 AUDI S4 safe to drive?

The 2021 AUDI S4 has 4 recalls. If you own this vehicle, check with your dealer to ensure all recall repairs have been completed. Most recalls have free remedies available.

Where can I check if my 2021 AUDI S4 has open recalls?

You can check for open recalls by visiting NHTSA.gov and entering your Vehicle Identification Number (VIN), or by contacting your local AUDI dealer.

πŸ“ŠYear-over-Year Context

➑️Stable Pattern

Compared to earlier years, the 2021 model shows stable reliability patterns. No meaningful structural change detected in recall frequency between adjacent model years.

🎯Risk Areas & Recommended Actions

Based on recall data, these components require verification:

1

Seat belts

Issue: increases crash or loss-of-control risk

βœ…

If you already own this vehicle: Contact your dealer immediately to confirm seat belts recall is complete. Recall repairs are always free.

πŸ”

If you are evaluating a used example: Request VIN and verify all seat belts recalls are completed before purchase.

Campaign:21V606000
2

Tires

Issue: increases crash or loss-of-control risk

βœ…

If you already own this vehicle: Contact your dealer immediately to confirm tires recall is complete. Recall repairs are always free.

πŸ”

If you are evaluating a used example: Request VIN and verify all tires recalls are completed before purchase.

Campaign:22V034000
3

Suspension

Issue: increases crash or loss-of-control risk

βœ…

If you already own this vehicle: Contact your dealer immediately to confirm suspension recall is complete. Recall repairs are always free.

πŸ”

If you are evaluating a used example: Request VIN and verify all suspension recalls are completed before purchase.

Campaign:21V295000
πŸ’‘Visit NHTSA.gov or contact your AUDI dealer to verify recall completion status.

🧭What This Means for You

Families with young passengers, pregnant drivers, or those with frequent highway commutes should prioritize this information.

If you're unsure, we recommend starting with a VIN check or consulting a certified mechanic.

πŸ”‘

If You Own This Vehicle

  • Verify all 4 recalls have been completed using your VIN at NHTSA.gov or through your AUDI dealer.
  • If any recalls are open, schedule service immediatelyβ€”recall repairs are always free.
  • Consider setting up VIN-specific alerts to receive notification of future recalls.
πŸ›’

If You're Buying Used

  • Request documentation proving all recalls were addressed before finalizing purchase.
  • Factor potential recall-related service time into your ownership cost estimates.
βš–οΈ

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Data sourced from the National Highway Traffic Safety Administration (NHTSA). Last updated: January 10, 2026.