2021 Audi S4 Problems
Shopping for a used 2021 Audi S4? This page highlights owner-reported complaint patterns and recall history so you can inspect the right systems before buying. Based on 2 real NHTSA owner complaints, with Electrical Faults the most reported area.
Before you buy
This 2021 Audi S4 has 2 NHTSA complaints — top issue: Electrical Faults.
A model-year pattern isn't the car in front of you. Check this exact VIN for accidents, open recalls, odometer rollback, and salvage titles.
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2021 Audi S4 Fuel Economy
✓ EPA Official DataEPA official fuel economy rating for the 2021 Audi S4.
Source: EPA FuelEconomy.gov. Figures reflect EPA lab testing; real-world results vary by driving style, load, and conditions.
2021 Audi S4 Safety Ratings
NHTSA 5-Star ProgramOfficial crash test results from the NHTSA 5-Star Safety Ratings program. Stars reflect government-conducted tests; higher is safer.
Overall
Not Rated9.9% rollover risk
Frontal Crash
Not RatedSide Crash
Not RatedRollover
9.9% probability
Source: NHTSA 5-Star Safety Ratings. Ratings are based on government crash tests and may not reflect all trim levels.
Based on NHTSA complaint data, the 2021 Audi S4 has 2 owner complaints, 0 crash-related complaints, and 4 recall campaigns on record. The most frequently reported component is Electrical Faults. NHTSA reliability signal: Good Record.
- Make
- Audi
- Model
- S4
- Model year
- 2021
- NHTSA owner complaints
- 2
- Crash-related complaints
- 0
- Safety recall campaigns
- 4
- Top reported component
- Electrical Faults
- Reliability signal
- Good Record
- EPA MPG combined
- 23
- EPA MPG city / highway
- 20 / 28
- Fuel type
- Premium Gasoline
- NHTSA rollover rating
- 5/5 stars
- Electronic stability control
- Standard
Common problems
Most common 2021 Audi S4 problems
Top owner-reported complaint areas and where they often appear.
Electrical Faults
Uncategorized Issues
Complaint patterns center on Electrical Faults, Uncategorized Issues. Use these as a pre-purchase inspection guide, then verify recall and damage history on the specific VIN.
Buyer verdict
Should you buy a used 2021 Audi S4?
The 2021 Audi S4 looks comparatively lower-risk based on complaint volume, but model-year averages do not confirm the condition of any specific used car.
Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report.
Pre-purchase
What to check before buying a used 2021 Audi S4
Inspection Focus
- Run a VIN check on the specific vehicle you are considering
- Verify all open recalls are completed at nhtsa.gov/recalls
- Request service records for the most-reported complaint components
- Have a certified mechanic inspect the vehicle before purchase
Before You Close the Deal
- Run a VIN check on the specific vehicle you are considering
- Verify all open recalls are completed at nhtsa.gov/recalls
- Request service records for the most-reported complaint components
- Have a certified mechanic inspect the vehicle before purchase
Check the exact car
Shortlist with model-year data. Decide with the exact VIN.
Before buying a used 2021 Audi S4, run a VIN history report to verify accidents, title brands, odometer records, theft checks, and open recalls for the exact vehicle.
Full breakdown
All 2021 Audi S4 complaints by category
Every owner-reported complaint category filed with NHTSA for the 2021 Audi S4. Use this as a pre-purchase inspection checklist.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Electrical Faults | 1 | — | — | — | |
| Uncategorized Issues | 1 | — | — | — |
Source: NHTSA Complaints Database. Complaint counts may exceed total complaints because one report can span multiple categories.
In their words
Real owner complaints
Read what owners actually reported to NHTSA for the 2021 Audi S4. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
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 ad…
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.
Source: NHTSA Complaints Database. Real owner reports for the 2021 Audi S4.
Safety recalls
2021 Audi S4 recalls
4 campaignsNHTSA recall campaigns for the 2021 Audi S4. 4 recall campaigns are on record for this model year. Recalls are free to fix at authorized dealers, but completion status must be verified on the exact VIN.
SEAT BELTS:REAR/OTHER:RETRACTOR
TIRES
SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY
BACK OVER PREVENTION:DISPLAY FUNCTION
Research more
Keep researching before you buy
Compare brands and categories, then check the exact car's history by VIN.
Questions
2021 Audi S4 buying FAQ
Buyer-focused answers based on real NHTSA complaint and recall data for this model year.
Is the 2021 Audi S4 reliable?▾
Good Record. NHTSA currently shows 2 owner complaints, 0 crash-related complaints, and 4 recall campaigns for this model year. The 2021 Audi S4 looks comparatively lower-risk based on complaint volume, but model-year averages do not confirm the condition of any specific used car. Treat this as a model-year signal, then verify the exact vehicle's condition and history before purchase.
What are the most common problems with the 2021 Audi S4?▾
#1: Electrical Faults (1 complaints). #2: Uncategorized Issues (1 complaints)
At what mileage do problems start on the 2021 Audi S4?▾
Mileage data is not available or insufficient for this model year.
How safe is the 2021 Audi S4?▾
Complaint data is not the same as crash-test scoring, but it does highlight possible risk patterns. For the 2021 Audi S4, NHTSA complaints include 0 crash-related reports and 0 fire reports out of 2 total complaints. For controlled crash-test ratings, check nhtsa.gov/ratings.
Does the 2021 Audi S4 have any recalls?▾
Yes. 4 NHTSA recall campaigns affect the 2021 Audi S4. A major recall area is SEAT BELTS:REAR/OTHER:RETRACTOR. 4 recall campaigns are on record for this model year. Always verify open recalls by VIN because completion status varies by vehicle.
Should I buy a 2021 Audi S4?▾
The 2021 Audi S4 looks comparatively lower-risk based on complaint volume, but model-year averages do not confirm the condition of any specific used car. Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report. Pay extra attention to Electrical Faults during inspection. Before committing, run a VIN history report to verify accidents, title brands, odometer records, and recall completion for the exact car.
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinSpector AI.
Wider context: See the full Audi S4 reliability report with year-by-year comparison.
Owner Reliability Rating
Rate the 2021 Audi S4 based on your ownership experience.
Add your rating:
Ratings are based on owner experience and are separate from NHTSA data shown above.
Before you buy
Check the exact vehicle history before you buy
Model-year complaints and recalls reveal patterns. A VIN report confirms whether the exact car has accident history, title brands, mileage issues, or open recalls.