2021 Mazda Cx-30 Gt Mhev 4X4 — MOT failures & pass rate
Across 670 MOT tests analysed for the 2021 Mazda Cx-30 Gt Mhev 4X4, the most common recorded failure areas were tyres, visibility and brakes. Its pass rate of 93.6% 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 | 3.0% | 20 |
| 2 | Visibility | 2.7% | 18 |
| 3 | Brakes | 1.9% | 13 |
| 4 | Emissions & environmental | 0.6% | 4 |
| 5 | Lighting & signalling | 0.6% | 4 |
| 6 | Suspension | 0.3% | 2 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 13 |
| 2 | Brake discs | 8 |
| 3 | Brake pads | 8 |
| 4 | Washers | 8 |
| 5 | Malfunction indicator lamp | 4 |
| 6 | Service brake performance | 3 |
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 | 16.1% | 108 |
| 2 | Tyres | 15.8% | 106 |
| 3 | Suspension | 5.8% | 39 |
| 4 | Other defects | 4.2% | 28 |
| 5 | Visibility | 1.9% | 13 |
| 6 | Lighting & signalling | 0.3% | 2 |
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 | 457 | 5.3% |
| 30-60k | 205 | 9.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 327 | 6.4% |
| 2025 | 331 | 6.7% |
What to check before buying a 2021 Cx-30 Gt Mhev 4X4
Before buying a 2021 Mazda Cx-30 Gt Mhev 4X4, focus on the areas it most often fails on. Tyres accounted for 3.0% of tests for this year.
- Tyres (3.0% 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 (2.7% 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 (1.9% 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 2021 Mazda Cx-30 Gt Mhev 4X4s pass their MOT?
93.6% of the 670 2021 Mazda Cx-30 Gt Mhev 4X4 MOT tests in this dataset passed — a 6.4% fail rate.
What is the most common MOT failure on a 2021 Mazda Cx-30 Gt Mhev 4X4?
Tyres, recorded in 3.0% of tests, followed by visibility (2.7%).
Does the 2021 Cx-30 Gt Mhev 4X4 get worse with mileage?
Its MOT fail rate rises from 5.3% in the 0-30k band to 9.3% in the 30-60k band.
Methodology & source. Based on 670 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.