Ford Mustang 2013: MOT failure rate for its age
13.6% of 221 MOT tests of the Ford Mustang first registered in 2013 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 75.2 (95% CI 48.3–102.1; 100 = normal for this model at that age): the 2013 build year is no different from other 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 | 13.6 | % | all ages tested | 2019–2024 | 221 |
| Index against this model at the same age (95% CI 48.3–102.1) | 75.2 | index | 100 = normal for this model at that age | 2019–2024 | 221 |
| Rank among this model's 8 build years | 1 | of 8 | 1 = fails least for its age | 2019–2024 | 221 |
| Tested in 2024 | 90 | tests | median 51,260 miles | 2024 | 90 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2013 Ford Mustang fail at each age?
Cars built in 2013 were tested at ages 6 to 11 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) |
|---|---|---|---|---|---|
| 6 | 78 (rough estimate) | 11.5 | 6.2–20.5 | 18.4 | 62.8 |
| 7 | 74 (rough estimate) | 10.8 | 5.6–19.9 | 17.4 | 62.2 |
| 8 | 69 (rough estimate) | 18.8 | 11.4–29.6 | 18.4 | 102.3 |
| 9 | 107 (rough estimate) | 9.3 | 5.2–16.4 | not available | not available |
| 10 | 114 (rough estimate) | 14 | 8.8–21.6 | not available | not available |
| 11 | 90 (rough estimate) | 12.2 | 7–20.6 | not available | not available |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 532 (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 2013 Ford Mustang?
The most common failure group on cars built in 2013 is lamps, reflectors and electrical equipment: 9.6 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 2013 were tested at ages 6 to 11.
| Failure group | Built 2013, per 100 | All build years, per 100 | Items |
|---|---|---|---|
| Lamps, reflectors and electrical equipment | 9.6 | 8.3 | 51 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 532 (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 2013 compare with the years around it?
Among the 8 published build years of the Ford Mustang, 2013 ranks 1 (1 = fails least for its age). 2014: index 94.0.
| 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 2013 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/2013/
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 2014 · Ford Mustang 2015 · 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