2014 Ford Mustang — MOT failures & pass rate
Across 624 MOT tests analysed for the 2014 Ford Mustang, the most common recorded failure areas were lighting & signalling, brakes and tyres. Its pass rate of 87.7% was above the average for cars of a similar age (82.8%). Higher-mileage examples failed more often — 20.0% in the 90-120k group versus 9.2% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 8.2% | 51 |
| 2 | Brakes | 3.7% | 23 |
| 3 | Tyres | 3.0% | 19 |
| 4 | Visibility | 2.4% | 15 |
| 5 | Suspension | 1.9% | 12 |
| 6 | Steering | 1.4% | 9 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp | 18 |
| 2 | Headlamp aim | 17 |
| 3 | Service brake performance | 16 |
| 4 | Individual direction indicators | 15 |
| 5 | Side repeaters | 14 |
| 6 | Position lamp | 12 |
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 | 9.3% | 58 |
| 2 | Brakes | 8.2% | 51 |
| 3 | Emissions & environmental | 5.8% | 36 |
| 4 | Suspension | 5.3% | 33 |
| 5 | Lighting & signalling | 4.2% | 26 |
| 6 | Other defects | 2.9% | 18 |
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 | 163 | 9.2% |
| 30-60k | 215 | 9.8% |
| 60-90k | 179 | 16.2% |
| 90-120k | 45 | 20.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 134 | 15.7% |
| 2022 | 140 | 11.4% |
| 2023 | 126 | 15.1% |
| 2024 | 113 | 10.6% |
| 2025 | 111 | 8.1% |
What to check before buying a 2014 Mustang
Before buying a 2014 Ford Mustang, focus on the areas it most often fails on. Lighting & signalling accounted for 8.2% of tests for this year.
- Lighting & signalling (8.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (3.7% 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 (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.
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 Ford Mustangs pass their MOT?
87.7% of the 624 2014 Ford Mustang MOT tests in this dataset passed — a 12.3% fail rate.
What is the most common MOT failure on a 2014 Ford Mustang?
Lighting & signalling, recorded in 8.2% of tests, followed by brakes (3.7%).
Does the 2014 Mustang get worse with mileage?
Its MOT fail rate rises from 9.2% in the 0-30k band to 20.0% in the 90-120k band.
Methodology & source. Based on 624 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.