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Mazda 3
2020 · gas
7 measured figures
7 of the 9 figures this market publishes for a car like this one are measured for this car. This market publishes no overall score, so there is no share of a composite weight to measure confidence against; figures_measured says how many of this market's figures the row carries, and contributing_publishers says who measured them

Measured figures

Fuel economy30.9 mpg (US gallons)Measured by NRCan · configuration: Mazda3 4-Door · also 7.6 L/100 km
Tailpipe CO₂178 g/kmMeasured by NRCan · CO₂ basis: tailpipe_rated · configuration: Mazda3 4-Door · also 286 g/mile
HorsepowerFree with an accountMeasured for this car, with its publisher and basis
WarrantyFree with an accountMeasured for this car, with its publisher and basis
Recall campaignsFree with an accountMeasured for this car, with its publisher and basis
NHTSA overall ratingFree with an accountMeasured for this car, with its publisher and basis
Complaints per 10,000 builtFree with an accountMeasured for this car, with its publisher and basis

5 more measured figures for this car — Horsepower, Warranty, Recall campaigns, NHTSA overall rating, Complaints per 10,000 built — each with the publisher that measured it and the basis it is on. Free to read with an account.

Figures this car does not carry

Fuel economy (MPGe)Not published for this carFuel economy (MPGe) is published for electric and hydrogen cars, whose economy is published as MPGe: energy converted at 33.7 kWh per gallon, not fuel burned; this car is not one of them, so the figure is not the same quantity for it
Tailpipe CO₂ (charge-weighted)Not published for this carthis car's CO₂ is published as the tailpipe rating for the car driven as rated on the test cycle (178 g/km), not as a composite weighted across electric and fuel-burning miles, so it is not the quantity this list orders. It is published as Tailpipe CO₂
Engine horsepowerNot published for this carNot published for this car. The record's own reason is free to read with an account.
Kerb weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
EPA test weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
PriceNot published for this carNot published for this car. The record's own reason is free to read with an account.

5-Year Running Costs

FuelUS$7,232
InsuranceUS$5,800 (modelled)
MaintenanceUS$5,200 (class estimate)
RepairsUS$8,000 (modelled)
Depreciationnot estimated — we hold no purchase price for this car, and it is not assumed.
Totalnot estimated — a component above is unknown or modelled

Running costs only — the purchase price is not included. The five-year running cost is an ESTIMATE, not a measurement of this car: only its fuel half is computed from the car's own measured consumption and a dated pump price (see fuel_price_source and fuel_price_as_of in the market's own figures); insurance, maintenance and repairs are class models. It orders no list and is not one of this market's published figures. Fuel is this car's own combined consumption over 15,000 km a year at 1.738 CAD a litre of petrol (Statistics Canada. Table 18-10-0001-01 Monthly average retail prices for gasoline and fuel oil, by geography; Canada; regular unleaded gasoline at self service filling stations, 2026-08). Adapted from Statistics Canada, Table 18-10-0001-01 Monthly average retail prices for gasoline and fuel oil, by geography, August 2026. This does not constitute an endorsement by Statistics Canada of this product. Costs are in US dollars; the CAD pump price is converted at 1 CAD = 0.73 USD, the rate set on 2026-09-13. Insurance, maintenance and repairs are models, not figures for this car: insurance from its power, weight and crash rating, maintenance from its make's class, repairs from its complaint and recall counts. They are shown for scale and are not used to rank it. Confidence is low: several components are modelled from class averages.

Known Issues

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
13 complaint(s)
THIS CAR IS ONLY A FEW MONTHS OLD, WITH ONLY 1600 MILES. WHILE DRIVING AT APPROX 30 OR 40 MPH THE SMART BRAKE SYSTEM (SBS) FALSELY DETECTS RANDOMLY AN OBSTACLE WHILE DRIVING, ACTIVATING THE AUTOMATIC…
FORWARD COLLISION AVOIDANCE: WARNINGS
9 complaint(s)
I was traveling 25mph with no obstruction in front of me, when the collision warning sounded. The braking system did not activate. No collision was imminent.
ELECTRICAL SYSTEM
3 complaint(s)
Automatic safety notification censoring system for the brakes engaged when a stop was not applicable or necessary causing the car to brake on its own in traffic. Luckily no one else was on the road.
STEERING
3 complaint(s)
MY NEW 2020 MAZDA 3 PREMIUM WITH 1,177 MILES SUDDENLY TOOK COMPLETE CONTROL OF STEERING MY CAR. DRIVING 65-70 MPH ON A 3 LANE STRAIGHT HIGHWAY ON A CLEAR DAY, WITH LIGHT TRAFFIC, I MOVED ONE LANE TO M…
UNKNOWN OR OTHER
3 complaint(s)
MY VEHICLE IS LESS THEN A YEAR OLD AND HAS LESS THAN 10000 MILES ON IT. THE PAINT IS CHIPPING EXTREMELY EASILY. WITHIN THE FIRST MONTH I HAD 3 CHIPS IN THE PAINT ALL THE WAY DOWN TO BARE METAL ON THE…
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
2 complaint(s)
FUEL/PROPULSION SYSTEM
2 complaint(s)
Fuel pump, car dying out, can't turn off brake release from when it dies. Shaking when accelerating. Fuel gas issue.
LANE DEPARTURE: WARNING
2 complaint(s)
SERVICE BRAKES
2 complaint(s)
SUSPENSION
2 complaint(s)
I pulled into the driveway (at about 5 mph) of my passenger's home, when a very loud, metallic pop occurred somewhere inside my vehicle. I could not discern the problem by visually inspecting the car…

The 10 components named in the most complaints are shown, of 20 named in all.

Data sources