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2021 Audi A4 allroad

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2021 A4 allroad.

Transmission Automatic (AM-S7)

The 2021 Audi A4 allroad Overview requires 5.5 qt of 0W‑20 engine oil and is paired with an AM‑S7 automatic transmission that delivers EPA‑rated 24/30/26 mpg. For the model year it recorded a single owner complaint, which focused on the Forward Collision Avoidance system, and was subject to one recall. Across the 2018‑2024 complaint history, 2021 stands as the low point with just one complaint, contrasting sharply with the 2020 peak of 154 reports.

Model year202520242023202220212020201620152014

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity5.5 qtOEM · verified
Engine oil type0W-20OEM · verified
Lug nut torque89 ft-lbsOEM · verified
EPA fuel economy24/30/26 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 49 · 92AH CCA battery, OE oil filter 06L115562B. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 49 · 92AH CCAOEM · verified
Tire size245/45R18OEM · verified
Wheel / rim7.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter06L115562B
Engine air filter8W0133843C
Spark plug06Q905601A
Battery8W0915089A
Front wiper blades8W1998002
Cabin air filter4M0819439C

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (AM-S7)

Dimensions & weight NHTSA vPIC

Overall length187.4 in
Overall width72.8 in
Overall height59.1 in
Wheelbase111 in
Curb weight3854 lb
Track (front / rear)62.2 / 61.8 in

Ratings & economy EPA / vPIC

EPA city / highway / combined24 / 30 / 26 mpg
DrivetrainAll-Wheel Drive
Passenger volume92 cu ft
Cargo volume24 cu ft
Recommended fuelPremium Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the A4 allroad of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

5.2–5.7 sec0–60 mph (tested)quickest 5.20 sec — 2017 Premium Plus Quattro Wagon
YearTrim / engine0–60¼ mileHPDrivetrain
2017Premium Plus Quattro Wagon 2.0L Turbo I-45.20 sec13.80 sec252 hpAWD
2017Premium Plus Quattro Wagon 2.0L Turbo I-45.50 sec14.10 sec252 hpAWD
2017Prestige Quattro Wagon 2.0L Turbo I-45.70 sec14.30 sec252 hpAWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 5.5 qt of 0W-20 engine oil, DOT 4 brake fluid. Torque lug nuts to 89 ft-lbs. The firing order is 1-3-4-2.

Lubricants & capacities

Brake FluidDOT 4
Clutch FluidDOT 4
Engine CoolantAudi Coolant G13-TL-VW774J
Engine Coolant Capacity10.5 qt
Engine Oil0W-20
Engine Oil Capacity5.5 qt

Engine torques

Cylinder Head InstructionsOnly use new bolts.

Chassis torques

Lug Nuts89 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2

Battery & A/C

RefrigerantR1234yf
Refrigerant Capacity1.12-1.18 lbs
Oil Capacity3.50-4.10 oz
Standard BCI Group Number49
Standard BCI Cranking Performance92AH cca
Optional BCI Group Number95R
Optional BCI Cranking Performance110AH cca

Service checks

Fuel Pump Pressure Minimum87.0 psi
Fuel Pump Pressure Maximum119.0 psi
Residual Pressure43.0 psi

Brakes

Brake Caliper Bolt to Carrier TorqueFront: 1LA
Brake Caliper Carrier to Hub Bolt TorqueFront: 1LA
ABS Sensor Torque6.4
Minimum Pad Thickness0.079" in
Vented Rotor Minimum Thickness for ReplacementFront: 1LA; Rear: 1KD

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
1110.0 ft. lbs., Step 2: 150.0 ft. lbs., Step 3: 90°110 ft. lbs
Cylinder Head — tightening sequence 1 stages
1Bolts with Collar37 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 10,000 mi; spark plugs every 40,000 mi.

Every 10,000 miBrake Linings (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire Repair Kit Sealant (inspect)
Every 20,000 miBody Water Drains (inspect) · Brake Line (inspect) · Cabin Air Filter (replace) · Door Hinge (lubricate) · Drive Axle Assembly (inspect) · Engine Assembly (leak inspection)
Every 40,000 miSpark Plugs (replace) · Transmission Assembly (drain & refill)
Every 60,000 miDrive Belt (replace) · Engine Air Filter Element (replace)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2021 Audi A4 allroad recorded only 1 complaint and 1 recall, placing it near the low‑end of the model‑generation complaint distribution that peaked at 154 complaints in 2020 and then fell to 1 in 2023. Compared with the surrounding years, 2021’s complaint count is markedly lower than 2020’s 154 and comparable to 2023’s single complaint, while its recall count matches the 2023 figure and is far below the 0‑3 recalls seen in 2018‑2020. The single recorded complaint falls under the “Forward Collision Avoidance” category, and no crash or fire complaints were reported for this year. Because the data does not specify a root cause, the implication is that the 2021 model experienced only isolated issues rather than a systemic defect. Consequently, from a reliability‑focused perspective the 2021 model year appears to be a solid choice for purchase, provided the specific recall is addressed.

1
Open recalls
NHTSA campaigns
746
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
1
Owner complaints
0 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Side★★★★★
Owner complaints by model year NHTSA · this generation & adjacent
’18’19’20’21’23’24

Owner complaints filed with NHTSA, by component

All 1 complaints on record, top 1 components.

Forward Collision Avoidance1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

22V034000TiresReported 26/01/2022

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… Remedy: 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…

Technical service bulletins NHTSA · verified

Showing 5 of 746 bulletins on record with NHTSA.

BulletinDateComponentSummary
TSB_2078939_22026-06-30EngineThis bulletin provides information when there DTC P218500 is stored in temerature sender…
TSB_2076404_82026-06-29Unknown Or OtherThis bulletin provides a deployment overview for customer service packages MLB and MQB…
TSB_2074640_32026-06-26EngineThis bulletin provides information when there is increased oil consumption; >0.5ltr/1000…
TSB_2074729_32026-06-23Electrical SystemThis bulletin provides informationwhen noises/vibration are detected from front of…
TSB_2059335_72026-06-23Electrical SystemThis bulletin provides information when there are noises from the area around the…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific A4 allroad. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 49 batteryVehicles taking 5.5 qtEngine oil filter 06L115562BEngine air filter 8W0133843CSpark plug 06Q905601ABattery 8W0915089A

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBsOBD-II trouble codesTorque specificationsMaintenance schedulesFluid capacities & specs

Frequently asked

How much oil does the 2021 A4 allroad take?

5.5 qt of 0W-20, per the factory manual.

Does the 2021 A4 allroad have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the A4 allroad get?

EPA figures are 24 city / 30 highway / 26 combined mpg.