MazdaCX302020Overview/mazda/cx30/2020/base/

2020 Mazda CX30

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2020 CX30.

Transmission Automatic (S6)

The 2020 Mazda CX30 pairs an Automatic (S6) transmission with EPA fuel-economy ratings of 25/33/28 mpg, and its reliability record is similarly measured: 31 owner complaints and 3 recalls, with the largest complaint category logged as "Unknown Or Other." That profile positions the 2020 model year as a low-complaint entry in the CX-30's reliability history, one defined by scattered or unspecified concerns rather than a concentrated, recurring defect.

Quick specs

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

Lug nut torque80-108 ft-lbsOEM · verified
EPA fuel economy25/33/28 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 47 · 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 47 · 520 CCAOEM · verified
Tire sizeP215/65R16, P215/55R18OEM · verified
Wheel / rim6.5, 7 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter1WPE14302 alt PY0114342
Engine air filterPAJ8133A0A
Fuel filterPA6A13ZE0 alt PA5W13ZE0
Spark plugPE5R18110A
BatteryPAF318520A9U
Front wiper bladesDGH967330 alt DGJ167330
Serpentine beltPX1315908 alt PY0115909A
ThermostatPYFD1516ZA
Cabin air filterBDGF61J6X

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 / combined25 / 33 / 28 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 Capacity1.03-1.13 lbs
Oil GroupPAG
Oil Type46
Oil Capacity3.38 oz
Standard BCI Group Number47
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 10,000 mi; spark plugs every 75,000 mi; coolant every 10,000 mi. The big-interval services (every 10,000 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 10,000 miAccessory Drive Belt (inspect) · Brake Hydraulic System (inspect fluid level) · Brake Linings (inspect) · Brake Rotor (inspect) · Engine Coolant System (inspect fluid level) · Engine Oil (drain & refill)
Every 30,000 miCabin Air Filter (replace)
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 CX30 top in one area — the unknown or other, 5 of 31 reports (16%), well ahead of the next concern. None of this vehicle's 3 recall campaigns target the unknown or other, 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 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.

3
Open recalls
NHTSA campaigns
675
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
31
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 31 complaints on record, top 8 components.

Unknown Or Other5
Electrical System3
Structure3
Power Train2
Engine2
Service Brakes,Forward Collision Avoidance2
Exterior Lighting,Service Brakes,Fuel/Propulsion System1
Power Train,Seat Belts,Unknown Or Other1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

21V086000Structure:Body:Hatchback/LiftgateReported 18/02/2021

Mazda North American Operations (Mazda) is recalling certain 2020-2021 CX-30 vehicles. When fully opened, the power liftgate may partially lower unexpectedly when the vehicle is parked facing uphill on a slope. Remedy: Mazda will notify owners, and dealers will update the power liftgate control module software and inspect the serial number of the power liftgate drive unit, replacing it if…

20V346000Service Brakes, Hydraulic:Foundation Components:Disc:CaliperReported 12/06/2020

Mazda North American Operations (Mazda) is recalling certain 2020 CX-30 and Mazda3 vehicles. The front brake caliper mounting bolts may not have been tightened properly during assembly, possibly allowing the calipers to… Remedy: Mazda will notify owners, and dealers will inspect the front brake caliper bolts, tightening them as necessary. If bolts are missing, the affected brake caliper will be replaced…

Technical service bulletins NHTSA · verified

Showing 5 of 675 bulletins on record with NHTSA.

BulletinDateComponentSummary
SA-042-262026-06-30Electrical SystemThis Service Alert supersedes the previously issued SAs listed below. The changes are…
SA-041-262026-06-18Electrical SystemThis SA supersedes the previously issued SA(s) listed below. The changes are noted in…
09-019-262026-06-17Electrical SystemThis bulletin supersedes the previously issued bulletin(s) listed below. The changes are…
SA-027-26a2026-06-16Electrical SystemThis SA supersedes the previously issued bulletin(s) listed below. The changes are noted…
SA-040-262026-06-15Electrical SystemThis Service Alert supersedes the previously issued SA(s) 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 CX30. 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 CX30 have open recalls?

NHTSA lists 3 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the CX30 get?

EPA figures are 25 city / 33 highway / 28 combined mpg.