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2021 Audi A4: common problems and reliability
· 2016-2025One of the better A4 years.
12 owner complaints, most about electrical system. 4 recalls.
Should I buy a 2021 A4?The 2021 Audi A4 has 12 owner-filed NHTSA complaints and 4 recalls on record. The most-reported areas are electrical system and forward collision avoidance. Owners most often flag oil consumption (burning a quart every 1,000 miles or less): multiple owners report oil consumption issues, with one owner needing an oil consumption test after finding multiple leaks.
Safety record for the 2021 model year
Source: NHTSA complaints and recalls filed for 2021 Audi A4 vehicles (US, public record).
The Year Score compares this year with other A4 years only. How we score it
Is 2021 a good year for the A4?
Across the 28 A4 model years we track, complaint volume runs from 1 (2023) to 673 (2007). With 12 complaints, the 2021 A4 sits below the model's median of 110.
These are raw NHTSA complaint totals, not adjusted for how many cars sold or how long each model year has been on the road. Older and higher-selling years accumulate more complaints.
Where owners report problems
Recalls affecting the 2021 A4
seat belts:rear/other:retractor
Campaign 21V606000Volkswagen 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."
tires
Campaign 22V034000Volkswagen 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.
suspension:rear:axle:non-powered axle assembly
Campaign 21V295000Volkswagen 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.
back over prevention:display function
Campaign 22V742000Volkswagen 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."
What owners report on the 2016-2025 A4
Owners of the 2016-2025 Audi A4 express strong overall satisfaction, frequently praising the car’s reliability, comfortable and quiet cabin, good fuel economy (especially on the highway), and Quattro all-wheel drive.
- RecurrentOil consumption (burning a quart every 1,000 miles or less)
Multiple owners report oil consumption issues, with one owner needing an oil consumption test after finding multiple leaks.
- RecurrentTiming chain replacement needed between 100,000-120,000 miles
Owners mention this as a known maintenance item costing around $4,000.
- IsolatedMMI system glitching
One owner of a 2019 A4 reported MMI glitches that required software updates.
- IsolatedTemperature sensor failure
One owner of a 2019 A4 reported an engine management light and fan running constantly due to a temperature sensor issue.
- IsolatedClutch failure on high-mileage examples
One owner reported a clutch burning out on a 2016 A4 with 65,000 miles shortly after purchase.
Owner insights for the 2016-2025 A4. Read the full 2016-2025 owner report.
Typical used price
Used A4 listings typically run $12,444–$21,675 across 2007 to 2024 model years.
Other A4 model years
Compare every A4 year side by side to see how 2021 ranks against the rest.
Compare the A4 against its rivals
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