2012 Infiniti Fx — MOT failures & pass rate
612 MOT tests on the 2012 Infiniti Fx are in this dataset, and 85.8% of them passed. All cars of a similar age fail 21.6% of the time, so this is 7.4pp better than the group it competes with. Failures cluster in lighting & signalling, tyres and emissions & environmental.
What the MOT record shows
No single area dominates — lighting & signalling (4.7%) and tyres (4.7%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, malfunction indicator lamp and position lamp — tread depth alone was recorded 23 times.
A 150k+ example is materially riskier than a 30-60k one: 19.1% versus 12.5%.
Advisories point at the next bill rather than this one: tyres was flagged on 21.7% of tests without failing them.
The trend is worsening — 12.1% of tests failed in 2021 against 16.2% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 4.7% | 29 |
| 2 | Tyres | 4.7% | 29 |
| 3 | Emissions & environmental | 4.1% | 25 |
| 4 | Brakes | 3.9% | 24 |
| 5 | Visibility | 3.3% | 20 |
| 6 | Suspension | 2.3% | 14 |
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 | 23 |
| 2 | Malfunction indicator lamp | 21 |
| 3 | Position lamp | 17 |
| 4 | Washers | 12 |
| 5 | Ball joint | 9 |
| 6 | Tyre pressure monitoring system | 8 |
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 | 21.7% | 133 |
| 2 | Suspension | 17.0% | 104 |
| 3 | Brakes | 15.8% | 97 |
| 4 | Emissions & environmental | 6.7% | 41 |
| 5 | Other defects | 5.6% | 34 |
| 6 | Steering | 5.4% | 33 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 30-60k | 40 | 12.5% |
| 60-90k | 207 | 10.6% |
| 90-120k | 210 | 17.1% |
| 120-150k | 106 | 14.1% |
| 150k+ | 47 | 19.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 132 | 12.1% |
| 2022 | 125 | 11.2% |
| 2023 | 129 | 14.7% |
| 2024 | 115 | 17.4% |
| 2025 | 111 | 16.2% |
What to check before buying a 2012 Fx
On a 2012 Fx, lighting & signalling is what the MOT record says goes wrong most — it appeared in 4.7% of tests. Check these areas before you commit.
- Lighting & signalling (4.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Tyres (4.7% 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.
- Emissions & environmental (4.1% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 2012 Infiniti Fxs pass their MOT?
85.8% of the 612 2012 Infiniti Fx MOT tests in this dataset passed — a 14.2% fail rate.
What is the most common MOT failure on a 2012 Infiniti Fx?
Lighting & signalling, recorded in 4.7% of tests, followed by tyres (4.7%).
Does the 2012 Fx get worse with mileage?
Its MOT fail rate rises from 12.5% in the 30-60k band to 19.1% in the 150k+ band.
Methodology & source. Based on 612 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.