MazdaCX32020Overview/mazda/cx3/2020/base/

2020 Mazda CX3

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2020 CX3.

Transmission Automatic (S6)

The 2020 Mazda CX3 is equipped with an automatic six-speed transmission and carries EPA fuel-economy ratings of 29 mpg city, 34 mpg highway, and 31 mpg combined. On the reliability front, this model year logged just one owner complaint, with air bags flagged as the top area of concern, along with one recall. That minimal complaint activity and single recall mark the 2020 CX3 as a low-incident model year in the vehicle's reliability record, making it a comparatively straightforward year for researchers to assess.

Model year20202019201820172016

Quick specs

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

Lug nut torque80-108 ft-lbsOEM · verified
EPA fuel economy29/34/31 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 35 · 520 CCA battery, OE oil filter 1WPE14302. 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 35 · 520 CCAOEM · verified
Tail / brake / turnFUSEOEM · verified
Tire sizeP215/60R16, P215/50R18OEM · verified
Wheel / rim6.5, 7 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter1WPE14302 alt PE0114342
Engine air filterPEHH133A0
Fuel filterP31L13ZE0 alt P31H13ZE0
Spark plugPE5R18110A
Battery0000800035WB
Front wiper bladesDB4G67330 alt D11B67330
Serpentine beltPEDD15908 alt PE0815909C
ThermostatPYFD1516ZA
Cabin air filterD09W61J6X

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (S6)

Dimensions & weight NHTSA vPIC

Overall length172.8 in
Overall width70.9 in
Overall height61.8 in
Wheelbase104.3 in
Curb weight3342 lb
Track (front / rear)61.8 / 61 in
Weight distribution (front / rear)60/40

Ratings & economy EPA / vPIC

EPA city / highway / combined29 / 34 / 31 mpg
DrivetrainFront-Wheel Drive
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

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

Torque lug nuts to 80-108 ft-lbs.

Chassis torques

Lug Nuts80-108 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity.87-.98 lbs
Oil GroupPAG
Oil Type100
Oil Capacity3.72 oz
Standard BCI Group Number35
Standard BCI Cranking Performance520 cca

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages
120.0-23.0 ft. lbs., Step 2: 80-100°20–23 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
167.0-81.0 ft. lbs., Step 2: 55°-65°67–81 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
167.0-81.0 ft. lbs., Step 2: 55°-65°67–81 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 7,500 mi; spark plugs every 75,000 mi; coolant at 120,000 mi. The big-interval services (at 120,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 miBrake Linings (inspect) · Brake Rotor (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 15,000 miBody Fasteners (torque) · Brake Line (inspect) · CV Joint Boot (inspect) · Cabin Air Filter (replace) · Fuel Line (inspect) · Steering Linkage (inspect)
Every 22,500 miAccessory Drive Belt (inspect) · Engine Air Filter Element (replace)
Every 30,000 miFuel Evaporative Emission Control System Lines (inspect)
Every 37,500 miExhaust System (Complete) (inspect) · Exhaust System Heat Shield (inspect)
Every 75,000 miSpark Plugs (replace)
At 120,000 miEngine Coolant System (drain, flush & refill)
At 180,000 miEngine Coolant System (drain, flush & refill)

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 2020 Mazda CX3 dominate in one area — the air bags, 1 of 1 reports (100%), well ahead of the next concern. None of this vehicle's 1 recall campaigns target the air bags, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 1 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the air bags 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.

1
Open recalls
NHTSA campaigns
318
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
1
Owner complaints
1 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 1 complaints on record, top 1 components.

Air Bags1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

23V487000Back Over Prevention: Sensing System: CameraReported 14/07/2023

Mazda North American Operations (Mazda) is recalling certain 2014-2018 Mazda3 and 2016-2021 CX-3 vehicles. The rearview camera image may not display properly by showing a flickering or distorted image. Remedy: Dealers will inspect and replace the rearview camera, as necessary. In addition, dealers will install a wiring harness fastening seal. All repairs will be performed free of…

Technical service bulletins NHTSA · verified

Showing 5 of 318 bulletins on record with NHTSA.

BulletinDateComponentSummary
SA-041-262026-06-18Electrical SystemThis SA supersedes the previously issued SA(s) listed below. The changes are noted in…
SA-027-26a2026-06-16Electrical SystemThis SA supersedes the previously issued bulletin(s) listed below. The changes are noted…
01-008-262026-05-01Power TrainThis bulletin supersedes the previously issued bulletin(s) listed below. The changes are…
SA-031-262026-04-30StructureDESCRIPTION Some vehicles may require the replacement of a damaged VIN plate or vehicle…
SA-029-262026-04-21Power TrainThis Service Alert supersedes the previously issued SA listed below: The changes are…

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 CX3. 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.

Reference guides

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

Frequently asked

Does the 2020 CX3 have open recalls?

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

What gas mileage does the CX3 get?

EPA figures are 29 city / 34 highway / 31 combined mpg.