Mazda MX-30 reliability: MOT pass rate and common faults

1,972 initial MOT tests in 2025 on cars first used in 2021 · DVSA data · For guidance only · How we count

Mazda MX-30 cars first used in 2021 had an MOT pass rate above the average for their age.

The MOT pass rate is one signal, not the whole story. An MOT checks safety and emissions on the day of the test. It doesn't record gearbox or engine faults, and a pass rate also reflects mileage and upkeep, so the table shows median mileage too. Whatever the year, the car in front of you matters more than its model's average.

89.7%passed first time

First-time pass rate, all years together: initial tests passed with no repairs. 95% range 88.3% to 91.0%.

Mazda MX-30, all years89.7%
Same-age average, all vehicles87.2%

In 2025, 89.7% of the 1,972 initial MOT tests on Mazda MX-30 cars were passed with no repairs. The same-age average, for all vehicles first used in the same years, was 87.2%. That is 2.5 points above the same-age average.

Check a specific MX-30

Its own MOT history, free.

Mazda MX-30 MOT pass rate by year

Year is when the car was first used. Older vehicles fail more often, so each year is compared with all vehicles first used that year.

Year	Chart	Testsmedian miles	Passed first time	Against all vehicles that year
2021age 4		1,97223,700	89.7%±1.5	+2.5 ptsall: 87.2%

Tests are initial MOT tests in 2025, not retests. Median miles is the middle odometer reading at the test: half had more, half had less. ± is the 95% margin of error in points (Wilson interval): a difference smaller than that could be chance. Years without a link have fewer than 10,000 tests, so they are listed here but don't have their own page.

When a car's mileage doesn't add up

Common MX-30 problems at the MOT

Share of the 203 failed tests with a fault in each area, all years together. A test can count in more than one area, so these can add up to more than 100%.

Tyres53.7%
Windscreen, wipers, mirrors33.5%

MOT records show roadworthiness faults, not engine or gearbox problems.

What to check when viewing an MX-30

Based on the areas where Mazda MX-30 MOT tests fail most often. These are general checks anyone can do, not a mechanical inspection.

Tyres
In 53.7% of failed MX-30 tests
- Check the tread on every tyre. The legal minimum for cars is 1.6 mm across the central three-quarters of the tread.
- Look for cuts, bulges, and wear on only the inner or outer edge, which can point to an alignment problem.
- Check that the spare wheel or the tyre repair kit is there.
Windscreen, wipers, mirrors
In 33.5% of failed MX-30 tests
- Look for chips and cracks in the windscreen, especially in front of the driver.
- Run the wipers and washers and check the blades clear the screen without smearing.
- Check both door mirrors and the rear-view mirror are intact and adjust.

Then read the car's own MOT history. Advisories in the same area at several tests are worth asking about.

Check an MX-30's MOT history

Mazda MX-30 questions

Is the Mazda MX-30 reliable?

MOT results show only part of the picture. In 2025, 89.7% of initial MOT tests on Mazda MX-30 cars were passed with no repairs, against a same-age average of 87.2%. That is 2.5 points above average. An MOT checks safety and emissions on the day of the test. It doesn't measure breakdowns, engine or gearbox faults, or repair costs.

What are the most common Mazda MX-30 problems at the MOT?

The most common failure areas are tyres (in 53.7% of failed tests) and windscreen, wipers, mirrors (in 33.5% of failed tests). A failed test can count in more than one area.

What mileage is normal for a 4-year-old Mazda MX-30?

At their 2025 MOT tests, Mazda MX-30 cars first used in 2021, about 4 years old, had a median of 23,700 miles. Half had more and half had less.

How do I check a specific MX-30's MOT history?

Enter its registration in our free check. It lists that car's own MOT results, the faults and advisories recorded and the mileage at each test, and flags repeated advisories and mileage that goes down.

Check a car's MOT history for free

What MOT data can't tell you about any Mazda MX-30

Outstanding finance, write-offs, theft and plate changes aren't in MOT records. For a particular car, you need a history check.

Compare history checks What MOT history doesn't show

Other Mazda models

Points above (+) or below (−) the same-age average for all vehicles.

All 10 Mazda models Cars ranked by MOT pass rate, by age

Source: DVSA anonymised MOT tests, 2025. For guidance only: these figures describe all Mazda MX-30 cars tested, not the one you're looking at. How we count