The service and repair manual for the 2021 Audi S4 — 3.0L V6 and 3.0L V6 engines, 6 trims. Matched to this exact model year, so the specifications and sequences are the ones Audi published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2021 |
|---|---|
| Engines | 3.0L V6 — 183 cu in, DOHC, turbocharged 3.0L V6 — 183 cu in, DOHC, supercharged |
| Trims | Prestige Sedan 4-Door · Premium Sedan 4-Door · Base Sedan 4-Door · Progressiv Sedan 4-Door · Premium Plus Sedan 4-Door · Technik Sedan 4-Door |
| Federal record | 4 recalls · 2 complaints · 906 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2021 S4 manual
03 / ContentsSections in the manual
- Quick Lookups 186
- General Information 1,422
- Accessories & Equipment 4,343
- Heating, Ventilation & A/C (HVAC) 1,977
- Body & Frame 3,885
- Maintenance 55
- Brakes 643
- Restraints 430
- Drivelines & Axles 612
- Steering 290
- Electrical 1,138
- Suspension 885
- Engine Mechanical 3,117
- Transmission 369
- Engine Performance 1,133
04 / Known issuesRecalls on federal record for the 2021 S4
- Suspension — rear › axle › non-powered axle assembly · 21V295000A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a.
- Tires · 22V034000Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash.
- Back Over Prevention — display function · 22V742000A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a cr.
- Seat Belts — rear/other › retractor · 21V606000An unsecured child restraint system can increase the risk of injury during a crash.
Owners have filed 2 complaints and Audi has issued 906 technical service bulletins for the 2021 S4. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2021 S4 manual
Is this manual specific to the 2021 S4?
Yes. It is the OEM manual matched to the 2021 model year, covering the 3.0L V6 and 3.0L V6 across the Prestige Sedan 4-Door, Premium Sedan 4-Door, Base Sedan 4-Door, Progressiv Sedan 4-Door, Premium Plus Sedan 4-Door, Technik Sedan 4-Door trims. Specifications and procedure sequences are the ones Audi published for this year.
What 2021 S4 problems does it help with?
4 recalls are on federal record for the 2021 S4, covering suspension, tires, back over prevention. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Audi dealers.
Does it include 2021 S4 wiring diagrams?
Yes — the complete wiring diagrams for the 2021 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $40.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther S4 years and 2021 Audi models
2024 S4 · 2023 S4 · 2022 S4 · 2020 S4 · 2019 S4 · 2018 S4 · 2017 S4 · 2016 S4 · 2015 S4 · all 27 years
2021 Audi A1 · 2021 Audi A3 · 2021 Audi A3 Quattro · 2021 Audi A4 · 2021 Audi A4 Quattro · 2021 Audi A4 allroad · 2021 Audi A5 · 2021 Audi A5 Quattro · 2021 Audi A5 Sportback · 2021 Audi A6 · 2021 Audi A6 Quattro · 2021 Audi A6 allroad · every 2021 model