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2021 Audi A5 Quattro

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2021 A5 Quattro.

Transmission Automatic (AM-S7)

The 2021 Audi A5 Quattro represents the compact executive coupe within Audi's lineup, built on the company's MLB platform and equipped with a turbocharged four-cylinder engine paired with a seven-speed S tronic automatic transmission (AM-S7), achieving EPA fuel economy ratings of 24 city, 31 highway, and 27 combined miles per gallon with a 5.5-quart oil capacity using 0W-20 viscosity. Across its model history, the A5 Quattro has established a generally solid reliability record, and with only 7 total owner complaints recorded for this model year—split across various systems with no single dominant issue—and 5 associated recalls, the 2021 model sits comfortably within expected parameters for the nameplate, suggesting that reported issues remain relatively uncommon and broadly distributed rather than concentrated in any particular system.

Model year202520242023202220212020

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 economy24/31/27 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 size245/45R18/XL 97HOEM · verified
Wheel / rim8.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter06L115562B
Engine air filter8W0133843C
Spark plug06Q905601A
Battery8W0915089A
Front wiper blades8W7998002 alt 8W1998002
Cabin air filter4M0819439C

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (AM-S7)

Dimensions & weight NHTSA vPIC

Overall length185 in
Overall width72.8 in
Overall height53.9 in
Wheelbase108.7 in
Curb weight3990 lb
Track (front / rear)62.6 / 61.8 in
Weight distribution (front / rear)56/44

Ratings & economy EPA / vPIC

EPA city / highway / combined24 / 31 / 27 mpg
DrivetrainAll-Wheel Drive
Recommended fuelPremium Gasoline

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 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 Maximum116.0 psi
Residual Pressure43.5 psi

Brakes

Brake Caliper Bolt to Carrier 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) · Convertible Top Latch (lubricate) · Door Hinge (lubricate) · Drive Axle Assembly (inspect)
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.

Owner complaints about the 2021 Audi A5 Quattro lead in one area — the unknown or other, 2 of 7 reports (29%), well ahead of the next concern. None of this vehicle's 5 recall campaigns target the unknown or other, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the unknown or other pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

5
Open recalls
NHTSA campaigns
1057
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
7
Owner complaints
0 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★★
Frontal★★★★★
Side★★★★★
Rollover★★★★★

Owner complaints filed with NHTSA, by component

All 7 complaints on record, top 5 components.

Unknown Or Other2
Electrical System2
Power Train1
Air Bags,Seats1
Forward Collision Avoidance1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 5 campaigns on record for this vehicle.

21V606000Seat Belts:Rear/Other:RetractorReported 05/08/2021

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… 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…

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 1057 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 A5 Quattro. 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 A5 Quattro take?

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

Does the 2021 A5 Quattro have open recalls?

NHTSA lists 5 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the A5 Quattro get?

EPA figures are 24 city / 31 highway / 27 combined mpg.