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Audi A4 problems, repairs and warranty value

Review possible repair costs and submitted NHTSA records for the Audi A4. Compare documented symptoms and manufacturer repair guidance, then choose your model year for its available records and repair estimates.

12model-year profiles
Partial datasubmitted complaints
Not availableunique vehicle recall campaigns
3 typesEPA powertrain choices
Animated diagnostic illustration for the Audi A4

Model records

What changes the warranty calculation

The Audi A4 records contain 418 submitted complaints across 11 matched model years. The median is 13 reports per matched year. 1 unmatched year is excluded from this comparison. NHTSA source snapshot: 2026-10-18.

The 2020 record contains 158 complaint reports, the highest raw count among matched years here; other years may tie. Vehicle sales and time on the road differ, so this comparison does not establish a failure rate.

Engine replacement or major internal repair has the highest arithmetic midpoint for parts in the applicable planning estimates, at $8,000 before labor. Confirm the configuration and remaining factory coverage before using this broad estimate to compare a service contract.

29 recall/model-year entries. A campaign can cover several years; the unique campaign count removes that repetition. Missing model-name matches remain unavailable.

Problem research and repair guidance

Audi A4: symptoms, affected vehicles and documented fixes

Match the symptom and the exact vehicle scope before arranging work. The imported catalogue is an editorial index of source documents, not an independent safety authority. Recall text is checked against NHTSA; each record links to the evidence that supports its scope and remedy.

5documented issue files
5vehicle systems

5 recall files · 0 other manufacturer files. These are editorial file counts, not distinct campaign totals, failure rates or a complete recall history.

BACK OVER PREVENTION

Official safety recall2021Campaign 22V742000

BACK OVER PREVENTION:DISPLAY FUNCTION: recall 22V742000

A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.

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 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."

Condition in the official record

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 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."

Which vehicles the source covers
  • NHTSA model names: A4. Model years: 2021.
  • NHTSA campaign 22V742000
  • The complete campaign lists 170,296 potentially affected units across all listed vehicles.
  • A make, model and year match does not establish VIN eligibility.

Safety recall eligibility is based on the VIN and campaign scope, not ordinary warranty mileage. Check the complete VIN even when the vehicle is outside its original warranty.

Component in the source: BACK OVER PREVENTION:DISPLAY FUNCTION

Published recall remedy

Dealers will update the infotainment unit software, free of charge. Owner notification letters were mailed October 25, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen's number for this recall is 91DZ.

Consequence in the NHTSA record: A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.

Official recall remedyManufacturer or authorized dealer · Confirm with the dealer

Dealers will update the infotainment unit software, free of charge. Owner notification letters were mailed October 25, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen's number for this recall is 91DZ.

Limit: Confirm VIN eligibility and current remedy instructions with the manufacturer.

Check the complete VINVIN lookup · Before arranging repairs

Check the 17-character VIN at NHTSA.gov/recalls and ask the manufacturer whether this campaign remains open for the vehicle.

Limit: The model-year list is not proof that an individual vehicle is affected.

Evidence for this issue
Open this problem file →

Source review: 2026-10-18

ENGINE AND ENGINE COOLING

Official safety recall2022Campaign 22V368000

ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM): recall 22V368000

An engine stall can increase the risk of a crash.

Volkswagen Group of America, Inc. (Audi) is recalling certain 2022 Audi A6 Sedan, A4 Sedan, Q5, and Q5 Sportback vehicles. The semiconductor inside the engine control unit may short-circuit and cause an engine stall.

Condition in the official record

Volkswagen Group of America, Inc. (Audi) is recalling certain 2022 Audi A6 Sedan, A4 Sedan, Q5, and Q5 Sportback vehicles. The semiconductor inside the engine control unit may short-circuit and cause an engine stall.

Which vehicles the source covers
  • NHTSA model names: A4. Model years: 2022.
  • NHTSA campaign 22V368000
  • The complete campaign lists 72 potentially affected units across all listed vehicles.
  • A make, model and year match does not establish VIN eligibility.

Safety recall eligibility is based on the VIN and campaign scope, not ordinary warranty mileage. Check the complete VIN even when the vehicle is outside its original warranty.

Component in the source: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

Published recall remedy

Dealers will replace the engine control unit, free of charge. Owner notification letters were mailed July 18, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 24iH.

Consequence in the NHTSA record: An engine stall can increase the risk of a crash.

Official recall remedyManufacturer or authorized dealer · Confirm with the dealer

Dealers will replace the engine control unit, free of charge. Owner notification letters were mailed July 18, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 24iH.

Limit: Confirm VIN eligibility and current remedy instructions with the manufacturer.

Check the complete VINVIN lookup · Before arranging repairs

Check the 17-character VIN at NHTSA.gov/recalls and ask the manufacturer whether this campaign remains open for the vehicle.

Limit: The model-year list is not proof that an individual vehicle is affected.

Evidence for this issue
Open this problem file →

Source review: 2026-10-18

SEAT BELTS

Official safety recall2021Campaign 21V606000

SEAT BELTS:REAR/OTHER:RETRACTOR: recall 21V606000

An unsecured child restraint system can increase the risk of injury during a crash.

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 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."

Condition in the official record

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 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."

Which vehicles the source covers
  • NHTSA model names: A4. Model years: 2021.
  • NHTSA campaign 21V606000
  • The complete campaign lists 45,496 potentially affected units across all listed vehicles.
  • A make, model and year match does not establish VIN eligibility.

Safety recall eligibility is based on the VIN and campaign scope, not ordinary warranty mileage. Check the complete VIN even when the vehicle is outside its original warranty.

Component in the source: SEAT BELTS:REAR/OTHER:RETRACTOR

Published recall remedy

Dealers will inspect, and replace as necessary, the middle-rear seat belt assemblies, free of charge. Owner notification letters were mailed August 27, 2021. Owners may contact Volkswagen customer service at 1-800-893-5298 and Audi customer service at 1-800-253-2834. Volkswagen's numbers for this recall are 69CR (VW) and 69CS (Audi).

Consequence in the NHTSA record: An unsecured child restraint system can increase the risk of injury during a crash.

Official recall remedyManufacturer or authorized dealer · Confirm with the dealer

Dealers will inspect, and replace as necessary, the middle-rear seat belt assemblies, free of charge. Owner notification letters were mailed August 27, 2021. Owners may contact Volkswagen customer service at 1-800-893-5298 and Audi customer service at 1-800-253-2834. Volkswagen's numbers for this recall are 69CR (VW) and 69CS (Audi).

Limit: Confirm VIN eligibility and current remedy instructions with the manufacturer.

Check the complete VINVIN lookup · Before arranging repairs

Check the 17-character VIN at NHTSA.gov/recalls and ask the manufacturer whether this campaign remains open for the vehicle.

Limit: The model-year list is not proof that an individual vehicle is affected.

Evidence for this issue
Open this problem file →

Source review: 2026-10-18

SEATS

Official safety recall2017, 2018, 2019, 2020Campaign 21V874000

SEATS: recall 21V874000

A disabled passenger air bag increases the risk of injury in the event of a crash.

Volkswagen Group of America, Inc. (Audi) is recalling certain 2017-2020 A4 Allroad, A4 Sedan, 2018-2019 RS5 Coupe, 2019 RS5 Sportback, 2018-2020 A5 Cabriolet, A5 Coupe, A5 Sportback, S4 Sedan, S5 Cabriolet, S5 Coupe, and Audi S5 Sportback vehicles. The cable connecting the seat heater to the Passenger Occupant Detection System (PODS) may have a contact fault, causing the software to misdiagnose a malfunction and disable the passenger air bag.

Condition in the official record

Volkswagen Group of America, Inc. (Audi) is recalling certain 2017-2020 A4 Allroad, A4 Sedan, 2018-2019 RS5 Coupe, 2019 RS5 Sportback, 2018-2020 A5 Cabriolet, A5 Coupe, A5 Sportback, S4 Sedan, S5 Cabriolet, S5 Coupe, and Audi S5 Sportback vehicles. The cable connecting the seat heater to the Passenger Occupant Detection System (PODS) may have a contact fault, causing the software to misdiagnose a malfunction and disable the passenger air bag.

Which vehicles the source covers
  • NHTSA model names: A4. Model years: 2017, 2018, 2019, 2020.
  • NHTSA campaign 21V874000
  • The complete campaign lists 208,332 potentially affected units across all listed vehicles.
  • A make, model and year match does not establish VIN eligibility.

Safety recall eligibility is based on the VIN and campaign scope, not ordinary warranty mileage. Check the complete VIN even when the vehicle is outside its original warranty.

Component in the source: SEATS

Published recall remedy

Dealers will replace the connecting cable and either the heating mat or entire seat cover, free of charge. Owner notification letters were mailed January 7, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 74E3. This recall is an expansion of Recall 19V-547 (74D9). Vehicles previously repaired under 19V-547 will need to return for the new remedy.

Consequence in the NHTSA record: A disabled passenger air bag increases the risk of injury in the event of a crash.

Official recall remedyManufacturer or authorized dealer · Confirm with the dealer

Dealers will replace the connecting cable and either the heating mat or entire seat cover, free of charge. Owner notification letters were mailed January 7, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 74E3. This recall is an expansion of Recall 19V-547 (74D9). Vehicles previously repaired under 19V-547 will need to return for the new remedy.

Limit: Confirm VIN eligibility and current remedy instructions with the manufacturer.

Check the complete VINVIN lookup · Before arranging repairs

Check the 17-character VIN at NHTSA.gov/recalls and ask the manufacturer whether this campaign remains open for the vehicle.

Limit: The model-year list is not proof that an individual vehicle is affected.

Evidence for this issue
Open this problem file →

Source review: 2026-10-18

SUSPENSION

Official safety recall2020, 2021Campaign 21V295000

SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY: recall 21V295000

A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.

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 stress corrosion.

Condition in the official record

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 stress corrosion.

Which vehicles the source covers
  • NHTSA model names: A4. Model years: 2020, 2021.
  • NHTSA campaign 21V295000
  • The complete campaign lists 40,993 potentially affected units across all listed vehicles.
  • A make, model and year match does not establish VIN eligibility.

Safety recall eligibility is based on the VIN and campaign scope, not ordinary warranty mileage. Check the complete VIN even when the vehicle is outside its original warranty.

Component in the source: SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY

Published recall remedy

Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L1.

Consequence in the NHTSA record: A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.

Official recall remedyManufacturer or authorized dealer · Confirm with the dealer

Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L1.

Limit: Confirm VIN eligibility and current remedy instructions with the manufacturer.

Check the complete VINVIN lookup · Before arranging repairs

Check the 17-character VIN at NHTSA.gov/recalls and ask the manufacturer whether this campaign remains open for the vehicle.

Limit: The model-year list is not proof that an individual vehicle is affected.

Evidence for this issue
Open this problem file →

Source review: 2026-10-18

Confirm who pays before authorizing work

A recall remedy follows the campaign and VIN eligibility. A service bulletin provides diagnosis or repair instructions; it does not by itself promise payment. Manufacturer warranty extensions and support programs have their own conditions.

Compare recalls, bulletins and warranty extensions →

Keep a current problem separate from future coverage

These files do not supply a shop quote. Ask for a diagnosis and written estimate, then check recall remedies or existing coverage. A new vehicle service contract generally excludes pre-existing conditions.

Prepare a useful description for the mechanic →

Each file retains its original source review date. Historical remedy wording can change; check the current manufacturer notice and NHTSA VIN lookup for your vehicle. The separately dated NHTSA counts elsewhere on this page use a different dataset and scope.

Read the evidence for this vehicle

What can the data tell you about Audi A4?

No model-specific individual-repair price keys are retained for Audi A4 in this library. Generic parts and labor estimates, public records and separate annual cost references may still be available.

Individual-repair price scopeGeneric inputs

Model-level range presence is a source-coverage check. It does not confirm that a repair fits every engine or model year.

EPA configuration match35 source rows

The mapped years for this model can include different equipment. Use the VIN and original specifications to identify the actual configuration.

Documented repair pathsCheck the source

Recall and communication counts describe records. They cannot establish a breakdown probability or current VIN status.

Price-key audit reviewed October 18, 2026; EPA source snapshot 2026-08-07. Individual-repair ranges and annual repair-budget references are different datasets.

Campaign-reference audit

One campaign can create many entries

1,200 selected recall files resolve to 780 distinct campaign IDs after compact references are normalized and checked against official NHTSA records. Files and campaigns are different counting units.

1200 selected recall files; normalized references checked against official NHTSA records

See the analysis, charts and method →

EPA configuration facts

Engines and drivetrains sold under this model name

FuelEconomy.gov lists 35 matched Audi A4 configurations across the model years shown here. Trim, engine and drive layout can change which repairs belong in a warranty comparison.

Vehicle classCompact car and Small station wagon
Fuel choicesGasoline, Gasoline or E85, and Hybrid
Drive layoutsAll-wheel drive and Front-wheel drive
Engine range2 L; 4 cylinders
EPA efficiency range24 to 31 mpg
Transmission typesAutomatic and Manual

These are ranges across EPA configurations, not the specification of every trim. The VIN and original window sticker settle the exact equipment. Source: FuelEconomy.gov vehicle data, dataset updated 2026-08-07.

Possible repair costs

Major repairs for this powertrain

These estimates use parts benchmarks and modeled independent-shop labor rates for 50-metro reference, so you can compare models using the same labor assumptions.

RepairEstimated range
Engine replacement or major internal repair$6,095 to $16,964
Transmission replacement$6,079 to $6,995
Transfer case replacement$2,189 to $8,192
Hybrid high voltage battery replacement$4,797 to $5,140
Turbocharger replacement$1,662 to $6,524
Head gasket replacement$2,339 to $3,728
Compare a warranty quote with repair costsAll Audi models