2012 Infiniti Fx30D Auto — MOT failures & pass rate
Across 482 MOT tests analysed for the 2012 Infiniti Fx30D Auto, the most common recorded failure areas were tyres, emissions & environmental and lighting & signalling. Its pass rate of 86.5% was above the average for cars of a similar age (79.6%). Higher-mileage examples failed more often — 19.1% in the 120-150k group versus 8.8% in the 30-60k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.8% | 28 |
| 2 | Emissions & environmental | 4.8% | 23 |
| 3 | Lighting & signalling | 3.3% | 16 |
| 4 | Brakes | 2.7% | 13 |
| 5 | Suspension | 2.7% | 13 |
| 6 | Body, structure & corrosion | 1.7% | 8 |
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 | 19 |
| 2 | Malfunction indicator lamp | 16 |
| 3 | Ball joint | 13 |
| 4 | Rigid brake pipes | 13 |
| 5 | Tyre pressure monitoring system | 11 |
| 6 | Rear fog lamp | 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 | 21.8% | 105 |
| 2 | Suspension | 15.6% | 75 |
| 3 | Brakes | 15.3% | 74 |
| 4 | Other defects | 5.6% | 27 |
| 5 | Steering | 4.2% | 20 |
| 6 | Body, structure & corrosion | 4.2% | 20 |
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 | 34 | 8.8% |
| 60-90k | 207 | 11.1% |
| 90-120k | 177 | 16.4% |
| 120-150k | 47 | 19.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 107 | 7.5% |
| 2022 | 96 | 11.5% |
| 2023 | 103 | 11.7% |
| 2024 | 91 | 16.5% |
| 2025 | 85 | 22.4% |
What to check before buying a 2012 Fx30D Auto
Before buying a 2012 Infiniti Fx30D Auto, focus on the areas it most often fails on. Tyres accounted for 5.8% of tests for this year.
- Tyres (5.8% 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.
- Emissions & environmental (4.8% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
- Lighting & signalling (3.3% 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 2012 Infiniti Fx30D Autos pass their MOT?
86.5% of the 482 2012 Infiniti Fx30D Auto MOT tests in this dataset passed — a 13.5% fail rate.
What is the most common MOT failure on a 2012 Infiniti Fx30D Auto?
Tyres, recorded in 5.8% of tests, followed by emissions & environmental (4.8%).
Does the 2012 Fx30D Auto get worse with mileage?
Its MOT fail rate rises from 8.8% in the 30-60k band to 19.1% in the 120-150k band.
Methodology & source. Based on 482 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.