2020 Mazda CX-30 — Full Specifications
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Running gear matters most — before anything else, UK: check tyre prices at TirendoUS: check wheel & tyre prices at WheelHero for this car's fitment.
The 2020 Mazda CX-30 is an SUV powered by a 2.5L 4-cyl regular gasoline engine. Its most fuel-efficient configuration returns around 34 mpg (UK) / 28 mpg (US EPA) combined, with 31–34 mpg (UK) across all configurations. Owners often keep a Mazda CX-30 workshop manual to hand for servicing and repairs.
Full Specifications
| Engine | 2.5L 4-cyl |
|---|---|
| Transmission | Automatic (S6) |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | SUV |
| Length | 4395 mm |
| Width | 1795 mm |
| Height | 1540 mm |
| Fuel Economy (UK) | 34 combined / 30 urban / 40 extra-urban mpg |
| Fuel Economy (US EPA) | 28 combined / 25 city / 33 highway mpg |
| CO₂ Emissions | 194 g/km |
| EPA Greenhouse Gas Score | 6 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,400 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2020 Mazda CX-30, all with the 2.5L 4-cyl engine. Combined fuel economy ranges from 26 to 28 mpg (US), or 31 to 34 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 2.5L 4-cyl | Automatic (S6) | 4-Wheel Drive | 31 | 26 (24/31) | 208 | $2,600 |
| 2.5L 4-cyl | Automatic (S6) | Front-Wheel Drive | 34 | 28 (25/33) | 194 | $2,400 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2020 Mazda CX-30
Running Costs: 2020 Mazda CX-30
Covering around 8,000 miles a year in a 2020 Mazda CX-30 at 34 mpg combined, expect roughly 1,070 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,400 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2020 Mazda CX-30 Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists 3 safety recall campaigns that include the 2020 Mazda CX-30 (as of 6 October 2026). Most affected areas: Structure (1), Service brakes (1), Fuel system (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Structure — campaign 21V086000, reported 18 February 2021. Risk: If the power liftgate unexpectedly lowers while a person is accessing the rear storage area of the vehicle, it can increase their risk of injury.
- Service brakes — campaign 20V346000, reported 12 June 2020. Risk: Loose brake calipers can reduce braking performance or interfere with wheel rotation, affecting vehicle handling. Either of these scenarios can increase the risk of a crash.
- Fuel system — campaign 20V347000, reported 12 June 2020. Risk: A fuel leak in the presence of an ignition source may increase the risk of a fire. Additionally, the engine may stall while driving, increasing the risk of a crash.
Owners have filed 33 complaints with NHTSA about the 2020 Mazda CX-30. The most-reported areas are Unspecified (9), Service brakes (7), Electrical system (5). Complaints include 1 reported crash. That is close to the median of 31 complaints across the 7 Mazda CX-30 model years in our data.
Used-buyer checklist for the 2020 Mazda CX-30
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Brakes (1 recall campaign · 7 owner complaints) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
- Fuel system (1 recall campaign · 5 owner complaints) — Ask whether any fuel-pump or fuel-system recalls were completed, and watch for hard starting or stalling.
- Body structure (1 recall campaign) — Inspect for corrosion and for subframe or body-panel damage, especially underneath.
- Electrical system (5 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Mazda CX-30 compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 34 mpg figure is 7 mpg better than that average. Its 194 g/km CO₂ figure is 59 g/km lower than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
At 34 mpg (UK) combined it sits close to the 34 mpg average for Mazda models in our database.
Of the 7 Mazda CX-30 model years we cover, the 2020 ranks 4th for combined fuel economy on its best configuration (34 mpg UK combined, against a high of 35 mpg). See every Mazda CX-30 year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2020 Mazda CX-30
Frequently Asked Questions
What engine does the 2020 Mazda CX-30 have?
It's fitted with a 2.5L 4-cyl regular gasoline engine, paired with a automatic (s6) transmission.
What is the fuel economy of the 2020 Mazda CX-30?
The most efficient configuration returns around 34 mpg (UK) combined, or 28 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 31 to 34 mpg.
How much does the 2020 Mazda CX-30 cost to fuel per year?
The US EPA estimates about $2,400 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2020 Mazda CX-30 have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 5 stars for frontal crash protection.
Does the 2020 Mazda CX-30 have any recalls?
NHTSA lists 3 safety recall campaigns that include the 2020 Mazda CX-30 (as of 6 October 2026). Most affected areas: Structure (1), Service brakes (1), Fuel system (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2020 Mazda CX-30?
Among the 33 owner complaints filed with NHTSA, the most-reported areas are Unspecified (9 complaints), Service brakes (7 complaints), Electrical system (5 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the Mazda CX-30's fuel economy good for an SUV?
Yes — it returns around 34 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track, making it one of the more efficient options in its class.