2020 Mazda Cx-30 Gt Mhev — MOT failures & pass rate
Across 4,770 MOT tests analysed for the 2020 Mazda Cx-30 Gt Mhev, the most common recorded failure areas were visibility, tyres and brakes. Its pass rate of 94.2% was above the average for cars of a similar age (90.5%). Higher-mileage examples failed more often — 9.6% in the 60-90k group versus 4.3% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Visibility | 2.5% | 120 |
| 2 | Tyres | 2.5% | 119 |
| 3 | Brakes | 1.5% | 70 |
| 4 | Emissions & environmental | 0.9% | 41 |
| 5 | Lighting & signalling | 0.8% | 40 |
| 6 | Suspension | 0.5% | 26 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 99 |
| 2 | Brake pads | 48 |
| 3 | Headlamp aim | 47 |
| 4 | Washers | 41 |
| 5 | Malfunction indicator lamp | 37 |
| 6 | Tread depth | 26 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 19.6% | 937 |
| 2 | Tyres | 18.0% | 859 |
| 3 | Suspension | 5.9% | 280 |
| 4 | Other defects | 4.5% | 213 |
| 5 | Visibility | 3.1% | 150 |
| 6 | Lighting & signalling | 0.3% | 16 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 2,983 | 4.3% |
| 30-60k | 1,636 | 8.1% |
| 60-90k | 135 | 9.6% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 4,729 | 5.8% |
| Hybrid | 41 | 4.9% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2022 | 40 | 0.0% |
| 2023 | 1,562 | 4.2% |
| 2024 | 1,568 | 5.9% |
| 2025 | 1,600 | 7.3% |
What to check before buying a 2020 Cx-30 Gt Mhev
Before buying a 2020 Mazda Cx-30 Gt Mhev, focus on the areas it most often fails on. Visibility accounted for 2.5% of tests for this year.
- Visibility (2.5% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
- Tyres (2.5% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Brakes (1.5% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2020 Mazda Cx-30 Gt Mhevs pass their MOT?
94.2% of the 4,770 2020 Mazda Cx-30 Gt Mhev MOT tests in this dataset passed — a 5.8% fail rate.
What is the most common MOT failure on a 2020 Mazda Cx-30 Gt Mhev?
Visibility, recorded in 2.5% of tests, followed by tyres (2.5%).
Does the 2020 Cx-30 Gt Mhev get worse with mileage?
Its MOT fail rate rises from 4.3% in the 0-30k band to 9.6% in the 60-90k band.
Methodology & source. Based on 4,770 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.