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2021 Audi A4

Hybrid

Compact Cars
3 EPA-rated configurations
Data refreshed 2026-10-26

Safety Signal

79 / 100 from the NHTSA recall record

RecallsNHTSA campaigns 4

Complaints3 crash · 1 injured reported 13

Crash ratingNHTSA overall 5★

Fuel economybest combined, EPA 28 mpg

2025 2024 2023 2022 2021 2020 2019 2018 2017 2016

The 2021 Audi A4 is sold in the U.S. as a hybrid compact SUV with 3 EPA-rated configurations. The most efficient version, the A4 quattro, is EPA-rated at 28 mpg combined. NHTSA lists 4 recall campaigns for this model year, which gives it a Safety Signal grade of C. Owners have filed 13 complaints, most often about the electrical system. NHTSA crash-tested it at 5 stars overall.

Audi A4 — photograph via Wikimedia Commons — Audi A4 · Photo: Alexander-93 · CC BY-SA 4.0 · Wikimedia Commons

Specs & fuel economy

Source: EPA fueleconomy.gov

Configuration	Powertrain	Drive	Engine / motor	City	Hwy	Comb	Annual fuel*
A4 quattro	Hybrid	AWD	2.0L 4-cyl turbo + 40V Li-Ion	25	34	28	$2,950
A4 S line quattro	Hybrid	AWD	2.0L 4-cyl turbo + 40V Li-Ion	24	31	27	$3,050
A4 allroad quattro	Hybrid	AWD	2.0L 4-cyl turbo + 40V Li-Ion	24	30	26	$3,150

*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 43342, 43239, 43261.

Emissions & certification

Source: EPA emission certificates

Configuration	Smog rating	Emission standard	Where it can be sold new	SmartWay
A4 S line quattro, A4 allroad quattro, A4 quattro	5 / 10	California LEV-III ULEV70 / Federal Tier 3 Bin 70	All 50 states (federal, all altitudes); California and states following California standards	—

Certified for all fifty states, so it can be registered new anywhere in the U.S.

The smog rating scores tailpipe pollutants other than greenhouse gases, 1 (worst) to 10 (best), and is comparable only within a model year. The standard is the federal bin or California tier the configuration was certified to. Both come from the EPA certificate behind the window sticker.

Specifications filed with NHTSA

Source: NHTSA vPIC

Dimensions Exterior

Body style	Crossover Utility Vehicle [CUV]
Doors	4
GVWR class	Class 1D: 5,001 - 6,000 lb (2,268 - 2,722 kg)

Engine Basics

Cylinders	4
Displacement	2 L

Engine Output

Horsepower

261 hp

Fuel Economy

Fuel	Gasoline

Seating

Seat rows	2
Seating capacity	5 seats

Transmission

Drivetrain	AWD/All-Wheel Drive
Transmission	Automatic
Transmission speeds	7

Driver assistance

Standard: Anti-lock brakes, Automatic emergency braking, Backup camera, Blind-spot monitoring, Electronic stability control, Forward collision warning, Lane departure warning, Pedestrian automatic emergency braking

Filed by the manufacturer with NHTSA under the federal vehicle-identification rule and decoded from the VIN pattern — not a manufacturer press kit, so it describes the configurations we could identify rather than every trim (seen: quattro Premium, quattro Premium Plus, quattro Prestige). Figures for the trim you are looking at may differ.

Dimensions & weight

Source: Transport Canada

Length	187.4 in
Width (body, without mirrors)	72.8 in
Height	56.3–59.1 in
Wheelbase	111.0 in
Track, front	61.8–62.2 in
Track, rear	61.0–61.8 in
Curb weight	3,633–3,854 lb
Weight distribution, front/rear	56/44

Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here 2 configurations: 4-door Sedan Quattro, Allroad Quattro. Where a range is shown, those versions differ. Width is the body without mirrors, which is why it can read narrower than a brochure figure. Before we used it we checked it against the US manufacturer press kits we hold (27 Sep 2026): wheelbase agreed within 1% on every vehicle we could compare, length on 98%, and the curb weight fell inside the manufacturer's range on 96%. Source dataset. Contains information licensed under the Open Government Licence – Canada. Licence.

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Recalls (4)

Source: NHTSA recall database

○minor

Back Over Prevention

91DZ

170,296 vehicles 95% reported repaired

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

Filed with NHTSAOwner letter PDF Remedy instructions PDF

NHTSA campaign 22V742000 reported Oct 5, 2022 Volkswagen Group of America, Inc. the full filing, and every vehicle covered →

●moderate

Suspension

42L5

31,058 vehicles 98% reported repaired

Problem Volkswagen 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. Risk Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash. Fix Dealers will inspect the rear axle, adjust the alignment as necessary, and replace any prematurely or unevenly worn tires, free of charge. Owner notification letters were mailed March 3, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L5.

Filed with NHTSARemedy instructions PDF

NHTSA campaign 22V034000 reported Jan 26, 2022 Volkswagen Group of America, Inc. the full filing, and every vehicle covered →

▲high

Seat Belts

69CR, 69CS

45,496 vehicles 99% reported repaired

Problem 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 Cr Risk An unsecured child restraint system can increase the risk of injury during a crash. Fix 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).

Filed with NHTSARemedy instructions PDF

NHTSA campaign 21V606000 reported Aug 5, 2021 Volkswagen Group of America, Inc. the full filing, and every vehicle covered →

▲high

Suspension

42L1

40,993 vehicles 99% reported repaired

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

Filed with NHTSARemedy instructions PDF

NHTSA campaign 21V295000 reported Apr 26, 2021 Volkswagen Group of America, Inc. the full filing, and every vehicle covered →

These are vehicle campaigns — the ones the automaker filed against this model. NHTSA also records equipment recalls, filed by a parts maker against a component (a tyre, a child seat, an aftermarket part), and those are not listed here or counted above. nhtsa.gov/recalls shows both for a VIN.

Whether any of this applies to one specific A4

A campaign covers a build range, not a model year, so two identical-looking cars from 2021 can differ. Both of these check a VIN against the manufacturer’s own list, free, in about ten seconds. Audi publishes its own lookup because federal rule 49 CFR 573.15 requires it to, and to keep it current to within seven days.

NHTSA VIN check →Audi’s own VIN lookup →

Hear about a recall before the letter does

The manufacturer’s letter is the last step of a recall: it has up to 60 days after filing to mail owners, at the address on the registration. We email you the day NHTSA posts a recall on the 2021 Audi A4, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.

Owner complaints

Source: NHTSA complaint database

13complaints filed

3 involved a crash · 0 a fire · 1 injuries · 0 deaths reported

7.1 per 10,000 built · Audi reported 18,268 A4 built (its Early Warning production report to NHTSA)

Filed per year: 2021: 3 · 2022: 1 · 2024: 1 · 2025: 7 · 2026: 1

Most-cited components

Unspecified 3

Electrical System 3

Power Train 3

Vehicle Speed Control 2

Suspension 2

Lane Departure 2

In owners' own words

Filed with NHTSA by the people who own these cars, one per problem area. Quoted as written, with anything identifying removed.

A few minutes into the drive the transmission oil is too hot warning light came on and the car went into a 'limp' mode, car could only be driven less than 10mph. If this occurred while making a turn or in the highway it could have been disastrous or even fatal.

Power Train Oct 20, 2026 NHTSA owner report · ODI 11772540

The instrument cluster has stop working. Have to monitore vehicle information, Mileage, service, Safty notifications and general vehicle information from the Audi app

Electrical System Oct 8, 2025 NHTSA owner report · ODI 11692106

Tires are original equipment. Only 19,000 miles on them. Was told all 4 tires have belt shifts and hop some. Suggested they should be replaced. These tires were great when new but you could tell from driving they were degrading. I'm and never had an issue with tires this new.

Tires Aug 31, 2025 NHTSA owner report · ODI 11684155

The vehicle at 13,xxx miles on the high ways, and during stop & go traffic; vehicle begins to tremble, transmission and floor shakes, rpms are higher than normal, abnormal noises coming from engine (screeching), jerking on acceleration on the first gears, rough idle, happens only on highways after 1hr of driving.

Engine Apr 1, 2025 NHTSA owner report · ODI 11652167

On several occasions while vehicle was stationary at a stoplight or moving very slowly the emergency braking system deployed, with seat belt tensioner activated and brakes applied with characteristic thunk sound. I could discern no threat at the time, but other cars were nearby.

Forward Collision Avoidance Aug 12, 2024 NHTSA owner report · ODI 11608025

The contact leased a 2021 Audi A4. The contact stated that the dealer had provided her with the vehicle rental while her vehicle was being repaired. The contact stated that while driving at 4 MPH and turning into a parking pace on the 4th floor of a parking garage, the vehicle inadvertently accelerated on its own at 100 MPH.

Vehicle Speed Control at 1,347 miles Nov 16, 2021 NHTSA owner report · ODI 11440644

Complaint counts are raw owner reports to NHTSA, not verified defects, and scale with how many were sold. Use them to spot patterns, not to rank.

Reported by Audi itself: 1 death-or-injury claim on this model year in its quarterly Early Warning reports to NHTSA (49 CFR 579.21): 1 injured, as claimed, not verified — about 5.5 per 100,000 built. Every A4 model year, by year and system → Dated and by system, they are exhibit F of the defect dossier.

Crash ratings

Source: NHTSA NCAP

Configuration	Overall	Frontal	Side	Rollover	Rollover risk
4 DR AWD	★★★★★	★★★★☆	★★★★★	★★★★★	10%
SW AWD	not rated	not rated	★★★★★	not rated	10%

NHTSA New Car Assessment Program. Standard driver-assist: forward collision warning, lane departure warning.

Service bulletins & campaigns

Source: NHTSA manufacturer communications

Extended coverage on file 1 filing by the manufacturer with NHTSA naming this model year

Term not in NHTSA’s summary · Audi warranty extension AWA 24-04Diagnosed and confirmed malfunction of the vehicle’s AEB system that resulted from failure or malfunction of the AEB system’s control unit, camera(s), LIDAR, and/or sensor(s) which enable automatic…

The term and the vehicles it covers are the manufacturer’s, as NHTSA’s summary of each filing states them; a dealer checks one particular car by its VIN. Every warranty extension on file, all makes →

Communicationsfiled with NHTSA 1,837

Most recentmanufacturer date 2026-09-25

Kindsas classified by NHTSA 1816 service bulletins, 19 others, 2 warranty extensions

Most often about: Electrical System, Equipment, Unknown Or Other, Structure, Engine.

TSB_2083409_1 Service bulletin
2026-09-25 · Unknown Or Other
This bulletin states that technicians are required to report to the manufacturer when a vehicle has flooded, and specify the height to which the vehicle has been flooded.
TSB_2083393_1 Service bulletin
2026-09-25 · Engine
This bulletin provides information when the starter/generator drive belt is noisy or came off.
TSB_2052680_2 Service bulletin
2026-09-25 · Unknown Or Other
This bulletin provides information for reporting safety related information to the manufacturer.
TSB_2074846_5 Service bulletin
2026-09-22 · Steering
This bulletin provides information about vibrations and rotational steering vibrations.
TSB_2065871_4 Service bulletin
2026-09-22 · Steering
This bulletin provides informaiton when DTC B200FF0 is stored.
TSB_2020552_15 Service bulletin
2026-09-22 · Visibility/Wiper
This bulletin provides service information regarding exterior glass cleaning.
TSB_2078648_4 Service bulletin
2026-09-18 · Structure — Body
This bulletin provides information about billing for a broken sunroof glass panel.
TSB_2068573_6 Service bulletin
2026-09-18 · Electrical System
This bulletin provides information when the rear parking sensor sometimes does not work, rear parking sensor loose, rear parking sensor fault message.

A service bulletin is the manufacturer telling its dealers how to diagnose or repair a known condition. It is not a recall, not a finding that the vehicle is defective, and the work is not automatically free — though a bulletin is often what a dealer works from when you describe a symptom, so quoting the document number can save a diagnosis. The count is every communication filed; the list shows the most recent, one entry per campaign, because a single campaign is usually filed as several documents on the same day. The summaries are NHTSA's; the full documents come from the manufacturer.

Diagnostic trouble codes on file

Source: NHTSA manufacturer communications and complaints

Codes documented against this model year in the federal record. A code appearing here does not mean this vehicle will set it — it means the code is part of this nameplate-year's documented history.

Code	What it means	Most often filed under	Where it appears
P2004 P2004 on Audi →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Engine	2 bulletins
P2006	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Engine	2 bulletins
P2014	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Engine	2 bulletins
P2015 P2015 on Audi →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Engine	2 bulletins

Generic codes (the second character is 0 or 2) mean the same thing on every vehicle sold in the United States. Manufacturer-specific codes (1 or 3) mean whatever the automaker assigned, and no honest source can define them for you — which is why the ones here carry the evidence instead of a definition. A code is a link when enough separate federal documents name it across the catalogue to be worth a page of its own; the rest are listed here, where the vehicle is the context that makes them mean something.

At the New York inspection station

Source: New York State DMV

New York inspections 0.86%

failed emissions

1,052 initial inspections of 1,032 vehicles.

Measure	The 2021 A4	Every 2021 vehicle	Behind it
Failed the emissions check	0.86%	1.9%	1,050
Failed the safety inspection	0.48%	1.5%	1,052
Air-bag warning lamp stayed lit	0.10%	0.19%	1,052
Miles driven a year	8,058	10,343	odometer at inspection
Average odometer	42,754	54,681	odometer at inspection

New York’s emissions test on these model years is an on-board diagnostics check: it fails a car whose check-engine light is on or whose self-tests have not finished. First inspections only, so a car that failed and came back is counted once; private and special plates, not taxis, livery or commercial plates. A rate appears only where at least 200 inspections stand behind it. “Every 2021 vehicle” is every 2021 model-year car, SUV and pickup inspected in the same window, all makes. This is the state’s record of test results, not a reliability score by itself. Source: New York State Department of Motor Vehicles, Vehicle Inspections (data.ny.gov, Open NY terms).

A4 by model year

all years, side by side →

Year Safety Recalls Complaints

2025 A 0 1 29 mpg 2024 A 0 6 30 mpg 2023 A 1 11 28 mpg 2022 B 3 7 29 mpg 2021 this page C 4 13 28 mpg 2020 B 3 158 30 mpg 2019 A 1 13 30 mpg 2018 A 1 45 31 mpg 2017 C 6 87 31 mpg 2016 A 0 11 27 mpg

Common questions about the 2021 A4

Source: EPA, NHTSA and manufacturer press kits

Does the 2021 Audi A4 have any recalls?

NHTSA has posted 4 recall campaigns for the 2021 Audi A4. The most serious on file is 21V606000, covering Seat Belts. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.

How safe is the 2021 Audi A4?

NHTSA gave the 2021 Audi A4 5 stars overall in its New Car Assessment Program tests — 4-star frontal crash, 5-star side crash, 5-star rollover. WhichTrim also grades it C (79/100) on its recall record, which is a different question from crash protection.

What is the fuel economy of the 2021 Audi A4?

Across the 3 EPA-rated configurations of the 2021 Audi A4, the best EPA combined figure is 28 mpg. Figures are the EPA's own, per configuration, and every one is listed above.

What are the dimensions of the 2021 Audi A4?

Transport Canada measured it at 187.4 in long, 72.8 in wide (body, without mirrors), 56.3–59.1 in tall, on a 111.0 in wheelbase. Curb weight: 3,633–3,854 lb depending on configuration. Those are its measurements of the North American versions; every figure is in the table above.

What do owners complain about on the 2021 Audi A4?

Owners have filed 13 complaints with NHTSA about the 2021 Audi A4, most often about unspecified, electrical system, power train. Of those, 3 involved a crash, 1 reported injuries. Complaints are unverified owner reports, so treat the pattern as a signal and the individual report as an anecdote.

How clean is the 2021 Audi A4?

The EPA smog rating for the 2021 Audi A4 is 5 out of 10. That score covers tailpipe pollutants other than greenhouse gases, and it only compares vehicles within the same model year. It is certified for all fifty states, so it can be registered new anywhere in the U.S. Its configurations were certified to different standards — California LEV-III ULEV70, Federal Tier 3 Bin 70 — which the table above lists per configuration.

Are there service bulletins for the 2021 Audi A4?

The manufacturer has filed 1837 service bulletins and related communications with NHTSA for the 2021 Audi A4, most often covering electrical system, equipment, unknown or other. The most recent is dated 2026-09-25. A bulletin is not a recall: it is the repair procedure a manufacturer sends its dealers for a condition it knows about, and the work is not automatically paid for. It is still worth knowing — if the symptom matches, quoting the bulletin number at the service desk can save a diagnosis. The document numbers and summaries are listed above.

How does the 2021 Audi A4 do at state inspection?

In New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2021 Audi A4 failed the emissions check on 0.86% of first inspections — lower than the 1.9% for every 2021 model-year vehicle inspected; and the safety inspection on 0.48% (every 2021 vehicle: 1.5%). The figures are New York State DMV’s own inspection records, first inspections only, and the table above sets each one against every vehicle of the same model year.

What we hold, and what an empty row means

Paid vehicle-history reports will not tell you the difference between “nothing happened to this car” and “we never received that record” — both of the big two say as much in their own help pages. Most of what is on this page comes from complete federal registers, so we can tell you which is which, row by row.

Data	Held	Source	What it covers — or what empty means
Fuel economy & configurations	3 configurations	EPA certification records	Every configuration the EPA certified for sale, with its own test figures.
Emission certificates	3 configurations	EPA emission certificates	Smog rating, standard and the sales area that decides where the car can be sold new.
Recalls	4	NHTSA recall campaigns	A complete federal register: every campaign covering this model year, with severity and advisory flags.
Owner complaints	13	NHTSA complaint database	Also complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold.
Crash ratings	2 tested	NHTSA NCAP	Only the configurations NHTSA chose to crash-test, which is never all of them.
Service bulletins	1837	NHTSA manufacturer communications	Everything the manufacturer told its dealers about a defect or malfunction, short of a recall.
Investigations	none	NHTSA Office of Defects Investigation	No defect investigation has been opened.
Driver-assist crash reports	none	NHTSA Standing General Order 2021-01	No report has been filed. Only entities named in the order report, and only crashes they hear of — so this is also what an unequipped car, or a manufacturer without telematics, looks like.
Specifications filed with NHTSA	12 fields	NHTSA vPIC, decoded from VIN patterns	What the manufacturer filed under the federal VIN rule — a configuration, not the full trim ladder.
Measured dimensions	7 fields	Transport Canada, Canadian Vehicle Specifications	Length, width, height, wheelbase, track and curb weight, measured on the North American versions.
Trims, pricing & equipment	none	Manufacturer press kit	We have not transcribed a press kit for this model year yet. This is our gap, not the manufacturer's — the one row here where an empty cell means we are behind.

Rebuilt nightly; this page was generated 2026-10-26. Every figure above is traceable to the source named beside it, and the JSON for this page carries the same values with their identifiers.

Sources & method

Safety Signal starts every model-year at 100 and subtracts points per open NHTSA recall campaign by severity: critical 15 (fire risk, park-outside or do-not-drive advisories), high 8 (brakes, steering, airbags, loss of drive power, structure, battery), moderate 6, minor 3 (software, labels, lighting fixed by an update). The most serious recall counts in full and each further one counts 85% of the one before, because a vehicle sold in millions is recalled more often than a rare one without being more dangerous — and because a flat subtraction bottomed the scale out, scoring a vehicle with 22 recalls within a point of one with six. A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F. Read it as what it counts: recall campaigns on the federal record, weighted by severity. The damping reduces the sales bias by roughly 40% but does not remove it: like our complaint counts, this is not normalized by how many were sold, so a best-seller still scores somewhat worse than an obscure model with the same real risk. NHTSA crash ratings, do-not-drive and park-outside advisories, and the crash, fire, injury and death counts in owner complaints are reported separately on every page and never blended into the letter — a vehicle can hold five stars and a poor letter at once, and where that happens we say so rather than leave you to notice. Because the scale subtracts from a clean sheet, a model year too new to have been recalled, complained about or bulletined scores full marks on an empty record; we label those grades provisional rather than present them as earned.

EPA figures come from fueleconomy.gov vehicle records. Recalls, complaints, investigations and crash ratings come from NHTSA's public flat files, refreshed nightly.

JSON for this page · API

2021 Audi A4

Specs & fuel economy

Emissions & certification

Specifications filed with NHTSA

Dimensions Exterior

Engine Basics

Engine Output

Fuel Economy

Seating

Transmission

Driver assistance

Dimensions & weight

Factory warranty running out?

Recalls (4)

Back Over Prevention

Suspension

Seat Belts

Suspension

Whether any of this applies to one specific A4

Hear about a recall before the letter does

Parts & accessories for the 2021 Audi A4

Owner complaints

Most-cited components

In owners' own words

Crash ratings

Service bulletins & campaigns

Diagnostic trouble codes on file

At the New York inspection station

failed emissions

A4 by model year

Common questions about the 2021 A4

Does the 2021 Audi A4 have any recalls?

How safe is the 2021 Audi A4?

What is the fuel economy of the 2021 Audi A4?

What are the dimensions of the 2021 Audi A4?

What do owners complain about on the 2021 Audi A4?

How clean is the 2021 Audi A4?

Are there service bulletins for the 2021 Audi A4?

How does the 2021 Audi A4 do at state inspection?

What we hold, and what an empty row means

Where to go next

Sources & method