2017 Infiniti Qx30 — MOT failures & pass rate
Across 721 MOT tests, the 2017 Infiniti Qx30 recorded a 90.4% pass rate. Against all cars of a similar age (12.7% fail rate), the 2017 Qx30 comes out 3.2pp better. Failures cluster in tyres, suspension and lighting & signalling.
What the MOT record shows
No single area dominates — tyres (3.0%) and suspension (3.0%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, coil spring and headlamp aim — tread depth alone was recorded 20 times.
Mileage is the strongest signal on the record: 3.3% of 0-30k cars fail, rising to 14.3% once past 90-120k — 4.4× the risk.
Tyres is the most common advisory, noted on 21.5% of tests — work that passed today but is likely due soon.
The trend is worsening — 5.0% of tests failed in 2021 against 14.7% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.0% | 22 |
| 2 | Suspension | 3.0% | 22 |
| 3 | Lighting & signalling | 2.6% | 19 |
| 4 | Visibility | 1.4% | 10 |
| 5 | Brakes | 1.1% | 8 |
| 6 | Emissions & environmental | 0.5% | 4 |
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 | 20 |
| 2 | Coil spring | 17 |
| 3 | Headlamp aim | 11 |
| 4 | Headlamp | 7 |
| 5 | Washers | 6 |
| 6 | Position 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 | Tyres | 21.5% | 155 |
| 2 | Brakes | 13.9% | 100 |
| 3 | Other defects | 5.3% | 38 |
| 4 | Suspension | 4.3% | 31 |
| 5 | Visibility | 1.3% | 9 |
| 6 | Lighting & signalling | 1.1% | 8 |
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 | 123 | 3.3% |
| 30-60k | 398 | 9.0% |
| 60-90k | 149 | 13.4% |
| 90-120k | 42 | 14.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 140 | 5.0% |
| 2022 | 141 | 7.8% |
| 2023 | 149 | 10.7% |
| 2024 | 141 | 9.2% |
| 2025 | 150 | 14.7% |
What to check before buying a 2017 Qx30
The failure pattern for this year is specific enough to inspect against: tyres accounted for 3.0% of tests. Start there.
- 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.
- Suspension (3.0% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
- Lighting & signalling (2.6% 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 2017 Infiniti Qx30s pass their MOT?
90.4% of the 721 2017 Infiniti Qx30 MOT tests in this dataset passed — a 9.6% fail rate.
What is the most common MOT failure on a 2017 Infiniti Qx30?
Tyres, recorded in 3.0% of tests, followed by suspension (3.0%).
Does the 2017 Qx30 get worse with mileage?
Its MOT fail rate rises from 3.3% in the 0-30k band to 14.3% in the 90-120k band.
Methodology & source. Based on 721 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.