2020 Mazda Cx-30 Gt Mhev Auto — MOT failures & pass rate
Across 2,953 MOT tests analysed for the 2020 Mazda Cx-30 Gt Mhev Auto, the most common recorded failure areas were tyres, visibility and lighting & signalling. Its pass rate of 95.3% was above the average for cars of a similar age (90.6%). Higher-mileage examples failed more often — 8.2% in the 60-90k group versus 3.0% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 2.9% | 86 |
| 2 | Visibility | 1.8% | 54 |
| 3 | Lighting & signalling | 0.9% | 27 |
| 4 | Brakes | 0.8% | 24 |
| 5 | Emissions & environmental | 0.6% | 17 |
| 6 | Suspension | 0.3% | 10 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 42 |
| 2 | Headlamp aim | 32 |
| 3 | Washers | 28 |
| 4 | Brake pads | 21 |
| 5 | Tread depth | 19 |
| 6 | Malfunction indicator lamp | 17 |
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 | 16.3% | 482 |
| 2 | Tyres | 15.0% | 442 |
| 3 | Suspension | 7.0% | 207 |
| 4 | Other defects | 3.9% | 115 |
| 5 | Visibility | 2.9% | 87 |
| 6 | Road wheels | 0.2% | 7 |
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 | 2,013 | 3.0% |
| 30-60k | 888 | 8.3% |
| 60-90k | 49 | 8.2% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 2,917 | 4.7% |
| Hybrid | 36 | 2.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2022 | 44 | 0.0% |
| 2023 | 983 | 3.6% |
| 2024 | 941 | 4.5% |
| 2025 | 985 | 6.3% |
What to check before buying a 2020 Cx-30 Gt Mhev Auto
Before buying a 2020 Mazda Cx-30 Gt Mhev Auto, focus on the areas it most often fails on. Tyres accounted for 2.9% of tests for this year.
- Tyres (2.9% 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.
- Visibility (1.8% 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.
- Lighting & signalling (0.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
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 Mhev Autos pass their MOT?
95.3% of the 2,953 2020 Mazda Cx-30 Gt Mhev Auto MOT tests in this dataset passed — a 4.7% fail rate.
What is the most common MOT failure on a 2020 Mazda Cx-30 Gt Mhev Auto?
Tyres, recorded in 2.9% of tests, followed by visibility (1.8%).
Does the 2020 Cx-30 Gt Mhev Auto get worse with mileage?
Its MOT fail rate rises from 3.0% in the 0-30k band to 8.2% in the 60-90k band.
Methodology & source. Based on 2,953 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.