2020 Mazda Cx-30 -L Lux Mhev — MOT failures & pass rate
Across 2,534 MOT tests analysed for the 2020 Mazda Cx-30 -L Lux Mhev, the most common recorded failure areas were tyres, visibility and brakes. Its pass rate of 93.3% was above the average for cars of a similar age (90.6%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.3% | 84 |
| 2 | Visibility | 2.5% | 64 |
| 3 | Brakes | 1.8% | 46 |
| 4 | Lighting & signalling | 1.2% | 30 |
| 5 | Suspension | 0.7% | 17 |
| 6 | Emissions & environmental | 0.6% | 15 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 71 |
| 2 | Wipers | 65 |
| 3 | Brake pads | 36 |
| 4 | Headlamp aim | 34 |
| 5 | Shock absorbers | 20 |
| 6 | Washers | 18 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 19.8% | 501 |
| 2 | Brakes | 19.1% | 484 |
| 3 | Suspension | 6.8% | 171 |
| 4 | Other defects | 6.3% | 159 |
| 5 | Visibility | 2.5% | 64 |
| 6 | Lighting & signalling | 0.6% | 15 |
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 | 1,483 | 4.5% |
| 30-60k | 977 | 9.8% |
| 60-90k | 68 | 8.8% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 849 | 5.4% |
| 2024 | 814 | 6.4% |
| 2025 | 844 | 8.5% |
What to check before buying a 2020 Cx-30 -L Lux Mhev
Before buying a 2020 Mazda Cx-30 -L Lux Mhev, focus on the areas it most often fails on. Tyres accounted for 3.3% of tests for this year.
- Tyres (3.3% 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 (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.
- Brakes (1.8% 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 -L Lux Mhevs pass their MOT?
93.3% of the 2,534 2020 Mazda Cx-30 -L Lux Mhev MOT tests in this dataset passed — a 6.7% fail rate.
What is the most common MOT failure on a 2020 Mazda Cx-30 -L Lux Mhev?
Tyres, recorded in 3.3% of tests, followed by visibility (2.5%).
Does the 2020 Cx-30 -L Lux Mhev get worse with mileage?
Its MOT fail rate rises from 4.5% in the 0-30k band to 8.8% in the 60-90k band.
Methodology & source. Based on 2,534 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.