2021 Mazda Cx-30 Lux Mhev Auto — MOT failures & pass rate
Across 1,335 MOT tests analysed for the 2021 Mazda Cx-30 Lux Mhev Auto, the most common recorded failure areas were tyres, brakes and visibility. Its pass rate of 95.4% was above the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 2.6% | 35 |
| 2 | Brakes | 1.8% | 24 |
| 3 | Visibility | 1.4% | 19 |
| 4 | Lighting & signalling | 1.1% | 14 |
| 5 | Emissions & environmental | 0.4% | 5 |
| 6 | Suspension | 0.4% | 5 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Brake pads | 16 |
| 2 | Wipers | 15 |
| 3 | Headlamp aim | 15 |
| 4 | Tread depth | 7 |
| 5 | Washers | 6 |
| 6 | Malfunction indicator lamp | 5 |
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 | 17.4% | 232 |
| 2 | Tyres | 16.6% | 222 |
| 3 | Suspension | 8.4% | 112 |
| 4 | Other defects | 5.3% | 71 |
| 5 | Visibility | 1.7% | 23 |
| 6 | Lighting & signalling | 0.3% | 4 |
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 | 923 | 3.7% |
| 30-60k | 386 | 7.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 664 | 4.8% |
| 2025 | 652 | 4.6% |
What to check before buying a 2021 Cx-30 Lux Mhev Auto
Before buying a 2021 Mazda Cx-30 Lux Mhev Auto, focus on the areas it most often fails on. Tyres accounted for 2.6% of tests for this year.
- Tyres (2.6% 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 (1.8% 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.
- Visibility (1.4% 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.
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 2021 Mazda Cx-30 Lux Mhev Autos pass their MOT?
95.4% of the 1,335 2021 Mazda Cx-30 Lux Mhev Auto MOT tests in this dataset passed — a 4.6% fail rate.
What is the most common MOT failure on a 2021 Mazda Cx-30 Lux Mhev Auto?
Tyres, recorded in 2.6% of tests, followed by brakes (1.8%).
Does the 2021 Cx-30 Lux Mhev Auto get worse with mileage?
Its MOT fail rate rises from 3.7% in the 0-30k band to 7.0% in the 30-60k band.
Methodology & source. Based on 1,335 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.