Mercedes-Benz GLA 2015: MOT failure rate for its age
15.1% of 53,185 MOT tests of the Mercedes-Benz GLA 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 99.4 (95% CI 97.2–101.5; 100 = normal for this model at that age): the 2015 build year is no different from other years of the same model at the same age.
| Measure | Value | Unit | Compared with | Years | Tests |
|---|---|---|---|---|---|
| Failed first time | 15.1 | % | all ages tested | 2019–2024 | 53185 |
| Index against this model at the same age (95% CI 97.2–101.5) | 99.4 | index | 100 = normal for this model at that age | 2019–2024 | 53185 |
| Rank among this model's 7 build years | 4 | of 7 | 1 = fails least for its age | 2019–2024 | 53185 |
| Tested in 2024 | 8843 | tests | median 69,157 miles | 2024 | 8843 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2015 Mercedes-Benz GLA 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 | 8,997 | 9.7 | 9.1–10.3 | 10.6 | 90.7 |
| 5 | 8,587 | 10.9 | 10.2–11.6 | 11.9 | 91.4 |
| 6 | 8,915 | 14.2 | 13.5–15 | 14.4 | 99 |
| 7 | 8,974 | 16.3 | 15.5–17 | 16.4 | 99.1 |
| 8 | 8,869 | 18.6 | 17.8–19.4 | 18.3 | 101.6 |
| 9 | 8,843 | 20.8 | 20–21.7 | 19.4 | 107.3 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 53,185 (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 Mercedes-Benz GLA?
The most common failure group on cars built in 2015 is suspension: 7.4 items per 100 first tests, against 3.3 across all build years of the Mercedes-Benz GLA. 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 |
|---|---|---|---|
| Suspension | 7.4 | 3.3 | 3,957 |
| Tyres | 6.1 | 5.7 | 3,249 |
| Visibility | 3.7 | 4 | 1,944 |
| Body, chassis, structure | 3.4 | 1.5 | 1,803 |
| Brakes | 3 | 2.7 | 1,609 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 53,185 (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 7 published build years of the Mercedes-Benz GLA, 2015 ranks 4 (1 = fails least for its age). 2014: index 92.3. 2016: index 101.2.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2014 | 92.3 | 89.2–95.5 | better | 20,994 |
| 2015 | 99.4 | 97.2–101.5 | no different | 53,185 |
| 2016 | 101.2 | 99.1–103.3 | no different | 64,239 |
| 2017 | 99.0 | 96.9–101.2 | no different | 67,226 |
| 2018 | 106.8 | 104.4–109.1 | worse | 66,223 |
| 2019 | 112.5 | 109.6–115.5 | worse | 50,982 |
| 2020 | 96.6 | 91.9–101.3 | no different | 18,461 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 341,310 (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). Mercedes-Benz GLA 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/mercedes-gla/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
Mercedes-Benz GLA 2014 · Mercedes-Benz GLA 2016 · Mercedes-Benz GLA 2017 · Mercedes-Benz GLA 2018 · Mercedes-Benz GLA 2019 · Mercedes-Benz GLA 2020 · Mercedes-Benz GLA in Norway · Mercedes-Benz GLA in Finland · Mercedes-Benz GLA in the Netherlands · Mercedes-Benz GLA by postcode area · Mercedes-Benz GLA body, chassis and structure failures · Mercedes-Benz GLA brakes failures · Mercedes-Benz GLA vehicle identification failures · Mercedes-Benz GLA lamps, reflectors and electrics failures · Mercedes-Benz GLA noise, emissions and leaks failures · Mercedes-Benz GLA road wheels failures · Mercedes-Benz GLA seat belts and airbags failures · Mercedes-Benz GLA steering failures · Mercedes-Benz GLA suspension failures · Mercedes-Benz GLA tyres failures · Mercedes-Benz GLA visibility failures