2019 Infiniti Q30 — MOT failures & pass rate
881 MOT tests on the 2019 Infiniti Q30 are in this dataset, and 92.2% of them passed. Small family cars of a similar age fail 9.6% of the time, so this is 1.8pp better than the group it competes with. Failures cluster in tyres, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — tyres (3.8%) and lighting & signalling (3.4%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, headlamp aim and washers — tread depth alone was recorded 15 times.
Mileage is the strongest signal on the record: 5.8% of 0-30k cars fail, rising to 18.0% once past 60-90k — 3.1× the risk.
Tyres is the most common advisory, noted on 23.5% of tests — work that passed today but is likely due soon.
The trend is worsening — 5.9% of tests failed in 2022 against 9.6% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.8% | 33 |
| 2 | Lighting & signalling | 3.4% | 30 |
| 3 | Brakes | 1.7% | 15 |
| 4 | Visibility | 1.5% | 13 |
| 5 | Emissions & environmental | 0.3% | 3 |
| 6 | Road wheels | 0.3% | 3 |
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 | 15 |
| 2 | Headlamp aim | 14 |
| 3 | Washers | 13 |
| 4 | Headlamp | 10 |
| 5 | Brake pads | 10 |
| 6 | Attachment | 7 |
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 | 23.5% | 207 |
| 2 | Brakes | 14.8% | 130 |
| 3 | Other defects | 10.2% | 90 |
| 4 | Steering | 1.9% | 17 |
| 5 | Visibility | 1.8% | 16 |
| 6 | Suspension | 0.7% | 6 |
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 | 448 | 5.8% |
| 30-60k | 375 | 9.1% |
| 60-90k | 50 | 18.0% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 787 | 7.9% |
| Diesel | 94 | 7.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2022 | 220 | 5.9% |
| 2023 | 216 | 6.0% |
| 2024 | 222 | 9.9% |
| 2025 | 218 | 9.6% |
What to check before buying a 2019 Q30
The failure pattern for this year is specific enough to inspect against: tyres accounted for 3.8% of tests. Start there.
- Tyres (3.8% 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.
- Lighting & signalling (3.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (1.7% 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 2019 Infiniti Q30s pass their MOT?
92.2% of the 881 2019 Infiniti Q30 MOT tests in this dataset passed — a 7.8% fail rate.
What is the most common MOT failure on a 2019 Infiniti Q30?
Tyres, recorded in 3.8% of tests, followed by lighting & signalling (3.4%).
Does the 2019 Q30 get worse with mileage?
Its MOT fail rate rises from 5.8% in the 0-30k band to 18.0% in the 60-90k band.
Methodology & source. Based on 881 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.