Skip advert
Advertisement
In-depth reviews

Mazda CX-3 SUV (2015-2020) - MPG, running costs & CO2

The SKYACTIV diesel in the Mazda CX-3 steals the show with its low running costs

Carbuyer Rating

3.4 out of 5

Owners Rating

4.3 out of 5

Read owner reviews
MPG, running costs & CO2 Rating

3.5 out of 5

Although the Mazda CX-3 should be quite cheap to run, it’s relatively expensive to buy compared to some of its rivals.

The CX-3 has been meticulously pored over by Mazda with an eye on keeping its weight down. Couple that to the brand's SKYACTIV engine range and you get a mini-SUV that’s more than capable of competing with its rivals in terms of outright fuel economy.

Mazda CX-3 MPG & CO2

The most economical engine in the range is the 1.8-litre SKYACTIV diesel, which returns an impressive 54.3mpg and has a CO2 emissions figure of 114g/km when paired with a six-speed manual gearbox. This is still some way behind the Peugeot 2008, returning up to 62.7mpg with its smaller 1.5-litre diesel. The CX-3's company-car Benefit-in-Kind (BiK) tax rate is reasonable, and the diesel engine is still the one to go for for business users - the lowest petrol falls into a BiK rating two bands higher. 

A 2.0-litre petrol engine is also available, but it isn’t as economical as the diesels. In official tests, the 118bhp version returning 42.8mpg in manual form (39.2mpg with an automatic). The two-wheel-drive version emits 141g/km of CO2 (140g/km for the automatic) which, given the car’s size, isn’t too bad. But, with a much smaller 1.2-litre petrol, the Peugeot 2008 can return up to a claimed 50.6mpg.

Advertisement - Article continues below

The range-topping 148bhp petrol model isn’t much less efficient than the 118bhp petrol (it returns 38.2mpg), but it’s only available with four-wheel drive and CO2 emissions are a little higher, at 160g/km of CO2, resulting in a high BiK rate.

After the first year's CO2-based road tax (generally included in the on-the-road price), every version of Mazda CX-3 costs £150 a year to tax.

Insurance

The CX-3’s insurance groups run from 13 to 19, slightly higher than some of its core competitors. This is perhaps due to the higher standard level of equipment, and Mazda’s slightly more upmarket image.

Warranty

The CX-3 has an industry-standard three-year/60,000-mile warranty. This is the same as all other Mazda models, but trails behind some manufacturers, such as Hyundai and Kia, which offer five and seven-year warranties respectively.

Servicing

Mazda offers three-year servicing plans that cost from £500 upfront, or allow you make monthly payments to help you spread the costs. The service interval is once a year or every 12,500 miles.

Skip advert
Advertisement

Richard is a former editor of Carbuyer, as well as sister site DrivingElectric.com, and he's now Deputy Editor at Auto Express. Having spent a decade working in the automotive industry, he understands exactly what makes new car buyers tick.

Skip advert
Advertisement

Most Popular

New Honda Prelude coming in 2026 with hybrid tech and simulated gear shifts
Honda Prelude front quarter
News
17 Dec 2024

New Honda Prelude coming in 2026 with hybrid tech and simulated gear shifts

Best new car deals 2024: this week’s top car offers
Carbuyer best new car deals hero
Deals
20 Dec 2024

Best new car deals 2024: this week’s top car offers

Best car leasing deals 2024: this week’s top PCH offers
Volkswagen ID. Buzz Carbuyer front
Deals
23 Dec 2024

Best car leasing deals 2024: this week’s top PCH offers

Tips & advice

View All
Car dashboard warning lights: what does each symbol mean?
Car dashboard symbols and meanings
Tips and advice
21 Oct 2024

Car dashboard warning lights: what does each symbol mean?

Electric car charging stations: public networks, charger types, apps and maps
Charging station
Tips and advice
23 Jul 2024

Electric car charging stations: public networks, charger types, apps and maps

PCP vs HP – which type of car finance is right for you?
PCP vs HP
Tips and advice
17 May 2022

PCP vs HP – which type of car finance is right for you?

Average speed cameras: how do they work?
Average speed cameras: how do they work?
Tips and advice
21 Mar 2024

Average speed cameras: how do they work?

Best cars

View All
Top 10 best car interiors
Peugeot 208 hatchback
Best cars
25 Jun 2021

Top 10 best car interiors

Top 10 best electric cars 2024
Best electric cars
Best cars
16 May 2024

Top 10 best electric cars 2024

Top 10 best cheap-to-run cars 2024
The best cheap-to-run cars 2023
Best cars
2 Jan 2024

Top 10 best cheap-to-run cars 2024

The UK's top 10 fastest hot hatchbacks 2024
Fastest hot hatchbacks hero
Best cars
2 Jan 2024

The UK's top 10 fastest hot hatchbacks 2024