2021 Audi A4 Reliability - Consumer Reports
In the sports sedan tug-of-war among Audi, BMW and Mercedes-Benz, the A4 now prevails over its peers. Sports sedans often fall short of expectations, being neither sporty nor luxurious, or prove unreliable. The A4 gets all of these things right, which is why it jumps to the top of this class in our rankings.
Alerts
There are 2 recalls on this vehicle. Learn More.

Reliability

We expect the 2022 A4 will be more reliable than the average new car. This prediction is based on data from 2019, 2020 and 2021 models. Select the used car model year to see reported issues with those similar past models.

Overall Reliability
Most Common Trouble Spots
Common Trouble Spot
Common Trouble Spot
The 2021 Audi A4 has been recalled 2 times by NHTSA. View Recalls
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Overall Reliability Verdict
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
POTENTIAL TROUBLE SPOTS
Engine Major
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Engine Minor
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Engine Cooling
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Transmission Major
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Transmission Minor
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Drive System
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Fuel System
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Electric System
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Climate System
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Suspension
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Brakes
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Exhaust
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Paint/Trim
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Body Integrity
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Body Hardware
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Power Equipment
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
In-car Electronics
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Reliability indicates how models have performed in the past, providing the basis for predicting how the vehicles will hold up in the year ahead. These charts provide the most comprehensive reliability information available to consumers. Based on information received from our latest subscriber survey for over 300,000 vehicles, our reliability history charts give you a rundown on how 2000 through 2021 vehicles are holding up in 17 potential trouble spots, ranging from the engine, transmission, and brakes to power equipment and the electrical system. NA indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.

Learn more about car Reliability.

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2021 Audi A4 owners. The owner comments describe problems respondents experienced with this vehicle.

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.

Fuel System

Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.

Climate System

Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.

Electric System

Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.

Transmission Minor

Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.

Paint/Trim

Paint (fading, chalking, cracking, or peeling), loose interior and exterior trim or moldings, rust.

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, leaks.

Drive System

Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.

Body Integrity

Squeaks, rattles, wind noises, loose or cracked seals and/or weather-stripping, air and water leaks.

Brakes

Antilock system (ABS), parking brake, master cylinder, calipers, rotors, pulsation or vibration, squeaking, brake failure or wear.

Engine Cooling

Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.

Body Hardware

Power or manual windows, locks and latches, tailgate, hatch or trunk, doors or sliding doors, mirrors, seat controls, safety belts, sunroof, convertible top.

Suspension

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

Power Equipment

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, remote engine start, alarm or security system

In-car Electronics

CD or DVD players, radio, speakers, GPS, communication system (e.g., OnStar), display screen freezes or goes blank, phone pairing (e.g. Bluetooth), voice control commands, steering wheel controls, portable music device interface (e.g., iPod/MP3 player), backup or other camera/sensors.

Compare 2021 Models

Similar Cars
Acura TLX
Audi A4
BMW 3 Series
Tesla Model 3
This score shows whether the model had more or fewer problems overall than the average model of that year, calculated from the total number of problems reported by subscribers in all 17 trouble spots.
Recalls
PROVIDED BY
SEAT BELTS
Aug 05, 2021
An unsecured child restraint system can increase the risk of injury during a crash.
Summary:
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."
What should you do:
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).
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
NHTSA CAMPAIGN ID Number: 21V606000
Potential Number of Units Affected: 45496
SUSPENSION
Apr 26, 2021
A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.
Summary:
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.
What should you do:
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.
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
NHTSA CAMPAIGN ID Number: 21V295000
Potential Number of Units Affected: 40993
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