The service and repair manual for the 2021 Audi A4 Quattro — the 2.0L I4 engine, 7 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 | 2.0L I4 — 121 cu in, DOHC, turbocharged |
| Trims | Prestige Sedan 4-Door · Premium Sedan 4-Door · S Line Sedan 4-Door · Progressiv Sedan 4-Door · Premium Plus Sedan 4-Door · Technik Sedan 4-Door +1 |
| Other 2021 A4 Quattro variants | A4 → |
| Federal record | 4 recalls · 19 complaints · 987 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2021 A4 Quattro manual
03 / ContentsSections in the manual
- Quick Lookups 162
- General Information 1,407
- Accessories & Equipment 4,343
- Heating, Ventilation & A/C (HVAC) 1,977
- Body & Frame 3,885
- Hybrid/Electric Powertrain 224
- Brakes 643
- Maintenance 55
- Drivelines & Axles 612
- Restraints 430
- Electrical 1,114
- Steering 290
- Engine Mechanical 1,629
- Suspension 887
- Engine Performance 1,092
- Transmission 430
04 / Known issuesRecalls on federal record for the 2021 A4 Quattro
- 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 19 complaints and Audi has issued 987 technical service bulletins for the 2021 A4 Quattro. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2021 A4 Quattro manual
Is this manual specific to the 2021 A4 Quattro?
Yes. It is the OEM manual matched to the 2021 model year, covering the 2.0L I4 across the Prestige Sedan 4-Door, Premium Sedan 4-Door, S Line Sedan 4-Door, Progressiv Sedan 4-Door, Premium Plus Sedan 4-Door, Technik Sedan 4-Door, Komfort Sedan 4-Door trims. Specifications and procedure sequences are the ones Audi published for this year.
What 2021 A4 Quattro problems does it help with?
4 recalls are on federal record for the 2021 A4 Quattro, 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 A4 Quattro 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 A4 Quattro years and 2021 Audi models
2024 A4 Quattro · 2023 A4 Quattro · 2022 A4 Quattro · 2020 A4 Quattro · 2019 A4 Quattro · 2018 A4 Quattro · 2017 A4 Quattro · 2016 A4 Quattro · 2015 A4 Quattro · all 29 years
2021 Audi A1 · 2021 Audi A3 · 2021 Audi A3 Quattro · 2021 Audi A4 · 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 · 2021 Audi A7 Sportback · every 2021 model