2021 Audi S4: Recalls, Problems & MPG
Here are the deets on the 2021 Audi S4: 4 recalls, 2 owner complaints and up to 23 mpg combined.
Recalls
4 vehicle recalls from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Suspension Vehicle recall #21V295000 · 2021 · 40,993 vehicles
What's wrong: 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…
Why it matters: A broken lock nut May misalign the rear axle, causing a loss of control and increasing the risk of a crash.
The fix: Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021.
Seat belts, Seat belts Vehicle recall #21V606000 · 2021 · 45,496 vehicles
What's wrong: 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…
Why it matters: An unsecured child restraint system can increase the risk of injury during a crash.
The fix: Dealers will inspect, and replace as necessary, the middle-rear seat belt assemblies, free of charge. Owner notification letters were mailed August 27, 2021.
Tires, Suspension Vehicle recall #22V034000 · 2022 · 31,058 vehicles
What's wrong: 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…
Why it matters: Rear axle misalignment May cause premature or uneven tire wear, increasing the risk of a crash.
The fix: 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.
Backup camera Vehicle recall #22V742000 · 2022 · 170,296 vehicles
What's wrong: 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…
Why it matters: A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.
The fix: Dealers will update the infotainment unit software, free of charge. Owner notification letters were mailed October 25, 2022.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 0 mention a fire, 0 injuries and 0 deaths were reported.
What owners describe
- Other / unknown (1): no single recurring theme in the descriptions.
- Electrical (1): no single recurring theme in the descriptions.
The 2021 Audi S4 has 2 owner complaints, ranking #20 of 28 S4 model years for complaints (well below the 21 average). Neighboring years: 2020 (16 complaints, 3 recalls), 2022 (1 complaints, 1 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 3.0 L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 20 | 28 | 23 | Premium |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2021 Audi S4.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
From $19.99/mo · $59.99/yrStep-by-step photos written from a real teardown. Great for first-timers.
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FAQ
Does the 2021 Audi S4 have any recalls?
Yes. NHTSA lists 4 vehicle recalls for the 2021 Audi S4. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2021 Audi S4 problems?
Owners have filed 2 complaints with NHTSA. The most-reported areas are other / unknown (1), electrical (1).
What gas mileage does the 2021 Audi S4 get?
EPA ratings run up to 23 mpg combined (3.0 L, Automatic (S8)), across 1 engine and transmission combos.
Where can I get a 2021 Audi S4 repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.