Mercedes-Benz GLA 2017: MOT failure rate for its age
11.9% of 67,226 MOT tests of the Mercedes-Benz GLA first registered in 2017 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 99.0 (95% CI 96.9–101.2; 100 = normal for this model at that age): the 2017 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 | 11.9 | % | all ages tested | 2019–2024 | 67226 |
| Index against this model at the same age (95% CI 96.9–101.2) | 99.0 | index | 100 = normal for this model at that age | 2019–2024 | 67226 |
| Rank among this model's 7 build years | 3 | of 7 | 1 = fails least for its age | 2019–2024 | 67226 |
| Tested in 2024 | 12757 | tests | median 52,293 miles | 2024 | 12757 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2017 Mercedes-Benz GLA fail at each age?
Cars built in 2017 were tested at ages 3 to 7 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) |
|---|---|---|---|---|---|
| 3 | 15,942 | 7.4 | 7–7.9 | 9.2 | 81.2 |
| 4 | 12,869 | 9.2 | 8.7–9.7 | 9.8 | 94.4 |
| 5 | 12,809 | 11.4 | 10.9–12 | 11.4 | 99.9 |
| 6 | 12,849 | 14.5 | 13.9–15.1 | 14 | 103.4 |
| 7 | 12,757 | 18 | 17.4–18.7 | 16.4 | 109.9 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 67,226 (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 2017 Mercedes-Benz GLA?
The most common failure group on cars built in 2017 is tyres: 5.2 items per 100 first tests, against 5.7 across all build years of the Mercedes-Benz GLA. These counts are not age-adjusted: cars built in 2017 were tested at ages 3 to 7.
| Failure group | Built 2017, per 100 | All build years, per 100 | Items |
|---|---|---|---|
| Tyres | 5.2 | 5.7 | 3,510 |
| Visibility | 3.9 | 4 | 2,633 |
| Brakes | 2.6 | 2.7 | 1,747 |
| Suspension | 2.4 | 3.3 | 1,639 |
| Body, chassis, structure | 2.1 | 1.5 | 1,391 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 67,508 (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 2017 compare with the years around it?
Among the 7 published build years of the Mercedes-Benz GLA, 2017 ranks 3 (1 = fails least for its age). 2016: index 101.2. 2018: index 106.8.
| 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 2017 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/2017/
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 2015 · Mercedes-Benz GLA 2016 · 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