2015 Ford Mustang — MOT failures & pass rate
Across 2,013 MOT tests, the 2015 Ford Mustang recorded an 87.5% pass rate. That is effectively the same as coupes & convertibles of a similar age (11.8% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in brakes, tyres and visibility.
What the MOT record shows
No single area dominates — brakes (4.6%) and tyres (3.8%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are rbt (sp), tread depth and washers — rbt (sp) alone was recorded 59 times.
Mileage is the strongest signal on the record: 9.2% of 0-30k cars fail, rising to 18.6% once past 90-120k — 2.0× the risk.
Tyres is the most common advisory, noted on 17.2% of tests — work that passed today but is likely due soon.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Brakes | 4.6% | 92 |
| 2 | Tyres | 3.8% | 77 |
| 3 | Visibility | 3.3% | 66 |
| 4 | Lighting & signalling | 3.0% | 61 |
| 5 | Suspension | 2.0% | 40 |
| 6 | Emissions & environmental | 1.3% | 27 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Rbt (sp) | 59 |
| 2 | Tread depth | 45 |
| 3 | Washers | 44 |
| 4 | Wipers | 41 |
| 5 | Parking brake performance | 31 |
| 6 | Headlamp aim | 23 |
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 | 17.2% | 346 |
| 2 | Brakes | 9.7% | 195 |
| 3 | Suspension | 6.0% | 120 |
| 4 | Other defects | 2.8% | 57 |
| 5 | Visibility | 2.3% | 47 |
| 6 | Emissions & environmental | 2.0% | 41 |
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 | 884 | 9.2% |
| 30-60k | 708 | 12.7% |
| 60-90k | 299 | 18.7% |
| 90-120k | 97 | 18.6% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 475 | 13.1% |
| 2022 | 392 | 13.3% |
| 2023 | 399 | 11.5% |
| 2024 | 377 | 12.5% |
| 2025 | 370 | 11.9% |
What to check before buying a 2015 Mustang
The failure pattern for this year is specific enough to inspect against: brakes accounted for 4.6% of tests. Start there.
- Brakes (4.6% 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 (3.8% 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.
- Visibility (3.3% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£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 2015 Ford Mustangs pass their MOT?
87.5% of the 2,013 2015 Ford Mustang MOT tests in this dataset passed — a 12.5% fail rate.
What is the most common MOT failure on a 2015 Ford Mustang?
Brakes, recorded in 4.6% of tests, followed by tyres (3.8%).
Does the 2015 Mustang get worse with mileage?
Its MOT fail rate rises from 9.2% in the 0-30k band to 18.6% in the 90-120k band.
Methodology & source. Based on 2,013 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.