19,026 tests in 2025
Mazda Cx-30 reliability and MOT pass rate
93.7% passed first time. The 6.3% fail rate is 16.3 points better than the all-car average, on a median example 4 years old with 27,178 miles.
Pass rate
93.7%
22.6% of all cars failed; 6.3% of these did.
Fixed on the day
2.4%
Passed after a defect was put right during the visit.
Median at test
27,178 mi
4 years old.
Fail rate by age
| Age at test | Tests | Fail rate |
|---|---|---|
| 3-5 years | 18,602 | 6.3% |
| 6-9 years | 199 | — |
| 10-13 years | 0 | — |
| 14+ years | 0 | — |
What the Cx-30 fails on
Share of failed tests with at least one fail item in each DVSA inspection section. A test can fail in several sections at once.
- Tyres374 dangerous44.5%
- Brakes269 dangerous26.1%
- Visibility19.7%
- Suspension28 dangerous11.3%
- Noise, emissions and leaks7.6%
- Lamps, reflectors and electrical equipment3.9%
- Identification of the vehicle1%
- Body, chassis, structure0.9%
Is the Cx-30 getting worse?
The fail rate rose 1.9 points to 6.3% from 2023 to 2025, against a falling rate across all cars.
| Year | Tests | Median age | Fail rate | All cars | |
|---|---|---|---|---|---|
| 2023 | 4,682 | — | 4.4% | 22.8% | |
| 2024 | 11,121 | — | 5.6% | 23.2% | |
| 2025 | 16,973 | — | 6.3% | 22.6% |
Fail rate is first attempts at class 4 tests. Median age is the age of a typical Cx-30 at its test that year, and it is the number to watch: across the whole fleet each extra year of age adds roughly 1.9 points to the fail rate, so a model whose age and fail rate rise together is simply getting older.
The exact defects that fail it
Every failure item DVSA recorded against a Cx-30 in 2025, counted by how many tests each one appeared on.
- 1Condition: has a cut in excess of the requirements deep enough to reach the ply or cords226 tests
- 2Brake pads: less than 1.5 mm thick209 tests
- 3Tread depth: tread depth below requirements of 1.6mm205 tests
- 4Wipers: does not clear the windscreen effectively195 tests
- 5Malfunction indicator lamp: inoperative or indicates a malfunction84 tests
- 6Shock absorbers: has a serious fluid leak80 tests
- 7Brake discs: significantly and obviously worn54 tests
- 8Condition: has ply or cords exposed43 tests
What wears out first
Advisories are the tester flagging wear that is still legal. A typical Cx-30 collects 2.22 of them per test, and these are the ones that come up most. Treat it as the running-repairs list for the next year or two.
- 1Tread depth: tread depth below requirements of 1.6mm2,444 tests
- 2Brake discs: in such a condition that it is seriously weakened2,171 tests
- 3Brake pads: less than 1.5 mm thick1,906 tests
- 4Shock absorbers: has a serious fluid leak1,487 tests
- 5Condition: has a tear, caused by separation or partial failure of its structure661 tests
- 6Brake discs: significantly and obviously worn605 tests
- 7Non-component advisories: Child Seat fitted not allowing full inspection of adult belt452 tests
- 8Condition: has a cut in excess of the requirements deep enough to reach the ply or cords388 tests
Questions
What is the Mazda Cx-30 MOT pass rate?
93.7% of the 19,026 Mazda Cx-30 first-attempt MOTs in 2025 passed. The fail rate of 6.3% compares with 22.6% across all cars. A further 2.4% passed after a defect was fixed during the test visit.
What does a Mazda Cx-30 usually fail on?
The single most common failure is "Condition: has a cut in excess of the requirements deep enough to reach the ply or cords", recorded on 226 failed tests, followed by "Brake pads: less than 1.5 mm thick" and "Tread depth: tread depth below requirements of 1.6mm". By section, tyres appears in 44.5% of failures, brakes appears in 26.1% of failures, visibility appears in 19.7% of failures.
Does age change the odds?
Sharply. At 3 to 5 years old the fail rate was 6.3%; at 3-5 years it was 6.3%. The median Mazda Cx-30 tested in 2025 was 4 years old with 27,178 miles.
Is the Mazda Cx-30 getting less reliable?
The fail rate rose 1.9 points to 6.3% from 2023 to 2025, against a falling rate across all cars.
First-attempt class 4 tests, 2025, from DVSA’s anonymised MOT data (OGL v3, retrieved 2026-09-12). DVSA records newer cars trim by trim; this page adds every Cx-30 trim together. Year-on-year figures come from the same DVSA extracts for 2026 and earlier years. Full method on the pass rates hub.
DVSA has published 3 safety recalls naming the Mazda Cx-30: Mazda Cx-30 recalls.
Other Mazda models
Checking a particular Cx-30?
The odds above are the model. The car in front of you has its own record: every test, every advisory, the mileage at each one.
Due a test? Find an approved MOT station near you.