2014 Infiniti Q50 — MOT failures & pass rate
2,435 MOT tests on the 2014 Infiniti Q50 are in this dataset, and 81.9% of them passed. Executive cars of a similar age fail 15.4% of the time, so this is 2.6pp worse than the group it competes with. Failures cluster in brakes, tyres and lighting & signalling.
What the MOT record shows
No single area dominates — brakes (7.7%) and tyres (7.4%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are brake pads, tread depth and position lamp — brake pads alone was recorded 110 times.
Condition tracks the odometer closely. Failures run at 18.5% in the 0-30k band and 26.3% in the 150k+ band, a 7.8-point spread.
Advisories point at the next bill rather than this one: suspension was flagged on 26.3% of tests without failing them.
The trend is worsening — 16.5% of tests failed in 2021 against 20.1% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Brakes | 7.7% | 187 |
| 2 | Tyres | 7.4% | 181 |
| 3 | Lighting & signalling | 6.5% | 158 |
| 4 | Suspension | 4.9% | 119 |
| 5 | Visibility | 2.0% | 49 |
| 6 | Emissions & environmental | 1.3% | 31 |
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 | 110 |
| 2 | Tread depth | 109 |
| 3 | Position lamp | 65 |
| 4 | Ball joint | 57 |
| 5 | Brake discs | 45 |
| 6 | Linkage ball joints | 44 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 26.3% | 641 |
| 2 | Brakes | 24.9% | 606 |
| 3 | Tyres | 24.4% | 595 |
| 4 | Other defects | 5.9% | 145 |
| 5 | Visibility | 3.9% | 94 |
| 6 | Lighting & signalling | 3.7% | 91 |
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 | 54 | 18.5% |
| 30-60k | 530 | 14.1% |
| 60-90k | 973 | 18.3% |
| 90-120k | 618 | 20.7% |
| 120-150k | 184 | 15.8% |
| 150k+ | 76 | 26.3% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 1,982 | 18.7% |
| Petrol | 279 | 13.6% |
| Hybrid | 164 | 17.7% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 497 | 16.5% |
| 2022 | 506 | 16.2% |
| 2023 | 497 | 18.3% |
| 2024 | 478 | 19.5% |
| 2025 | 457 | 20.1% |
What to check before buying a 2014 Q50
On a 2014 Q50, brakes is what the MOT record says goes wrong most — it appeared in 7.7% of tests. Check these areas before you commit.
- Brakes (7.7% 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.
- Tyres (7.4% 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 (6.5% 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 2014 Infiniti Q50s pass their MOT?
81.9% of the 2,435 2014 Infiniti Q50 MOT tests in this dataset passed — a 18.1% fail rate.
What is the most common MOT failure on a 2014 Infiniti Q50?
Brakes, recorded in 7.7% of tests, followed by tyres (7.4%).
Does the 2014 Q50 get worse with mileage?
Its MOT fail rate rises from 18.5% in the 0-30k band to 26.3% in the 150k+ band.
Methodology & source. Based on 2,435 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.