Ford Mustang 2015: MOT failure rate for its age
13.9% of 1,742 MOT tests of the Ford Mustang first registered in 2015 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 85.1 (95% CI 74.4–95.9; 100 = normal for this model at that age): the 2015 Ford Mustang fails less often than other build years of the same model at the same age. This is a rough estimate from a smaller sample.
| Measure | Value | Unit | Compared with | Years | Tests |
|---|---|---|---|---|---|
| Failed first time | 13.9 | % | all ages tested | 2019–2024 | 1742 |
| Index against this model at the same age (95% CI 74.4–95.9) | 85.1 | index | 100 = normal for this model at that age | 2019–2024 | 1742 |
| Rank among this model's 8 build years | 2 | of 8 | 1 = fails least for its age | 2019–2024 | 1742 |
| Tested in 2024 | 328 | tests | median 32,699 miles | 2024 | 328 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2015 Ford Mustang fail at each age?
Cars built in 2015 were tested at ages 4 to 9 between 2019 and 2024. Each row compares their first-time failure share with what this model normally shows at that age, after allowing for the overall failure level of each test year.
| Age | Tests | Failed, % | 95% interval | Normal for this model at that age, % | Index (100 = normal) |
|---|---|---|---|---|---|
| 4 | 306 (rough estimate) | 10.1 | 7.2–14 | 14.1 | 71.7 |
| 5 | 298 (rough estimate) | 9.1 | 6.3–12.9 | 15.4 | 58.7 |
| 6 | 426 (rough estimate) | 16.4 | 13.2–20.2 | 16.9 | 97.4 |
| 7 | 351 (rough estimate) | 16.8 | 13.3–21.1 | 16.7 | 100.8 |
| 8 | 361 (rough estimate) | 15.2 | 11.9–19.3 | 17.9 | 85 |
| 9 | 328 (rough estimate) | 16.2 | 12.6–20.5 | not available | not available |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 2,070 (initial tests) · Method: normal rate = this model's first-time failure share at that age across its build years (cells of 400+ tests), adjusted for each test year's overall level; cells of 30+ tests, under 500 marked rough · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
What fails most on the 2015 Ford Mustang?
The most common failure group on cars built in 2015 is lamps, reflectors and electrical equipment: 6.2 items per 100 first tests, against 8.3 across all build years of the Ford Mustang. These counts are not age-adjusted: cars built in 2015 were tested at ages 4 to 9.
| Failure group | Built 2015, per 100 | All build years, per 100 | Items |
|---|---|---|---|
| Lamps, reflectors and electrical equipment | 6.2 | 8.3 | 129 |
| Tyres | 5.9 | 6 | 122 |
| Brakes | 5.8 | 8.2 | 120 |
| Visibility | 5.7 | 4.8 | 117 |
| Suspension | 2.4 | 4.1 | 49 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 2,070 (initial tests of this build year) · Method: failure items grouped by DVSA's top-level defect groups, per 100 initial tests; groups with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
How does 2015 compare with the years around it?
Among the 8 published build years of the Ford Mustang, 2015 ranks 2 (1 = fails least for its age). 2014: index 94.0. 2016: index 100.7.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2013 | 75.2 | 48.3–102.1 | no different (rough estimate) | 221 |
| 2014 | 94.0 | 71.0–117.0 | no different (rough estimate) | 394 |
| 2015 | 85.1 | 74.4–95.9 | better (rough estimate) | 1,742 |
| 2016 | 100.7 | 96.7–104.7 | no different | 15,714 |
| 2017 | 92.4 | 87.5–97.3 | better | 10,282 |
| 2018 | 105.2 | 99.4–111.0 | no different | 8,746 |
| 2019 | 117.8 | 108.0–127.6 | worse (rough estimate) | 3,654 |
| 2020 | 116.9 | 103.5–130.3 | worse (rough estimate) | 2,091 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 42,844 (initial tests) · Method: observed failures against those expected for the same model at the same ages, test-year level adjusted; verdict follows the printed one-decimal bound · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
How to cite this page
MOT Risk Index (2026). Ford Mustang 2015 MOT statistics (data release dvsa-2024-v2; full dataset motriskindex-families-2024-v5, DOI 10.5281/zenodo.22975051), updated 30 September 2026. motriskindex.co.uk/cars/ford-mustang/2015/
How every figure is calculated: methodology. Age, test year and build year are tied together (age = test year − build year), so the test-year level is taken as observed, not estimated.
Other pages for this model
Ford Mustang 2013 · Ford Mustang 2014 · Ford Mustang 2016 · Ford Mustang 2017 · Ford Mustang 2018 · Ford Mustang 2019 · Ford Mustang 2020 · Ford Mustang in Norway · Ford Mustang in Finland · Ford Mustang in the Netherlands · Ford Mustang by postcode area · Ford Mustang body, chassis and structure failures · Ford Mustang brakes failures · Ford Mustang vehicle identification failures · Ford Mustang lamps, reflectors and electrics failures · Ford Mustang noise, emissions and leaks failures · Ford Mustang road wheels failures · Ford Mustang seat belts and airbags failures · Ford Mustang steering failures · Ford Mustang suspension failures · Ford Mustang tyres failures · Ford Mustang visibility failures