MG ZS 2020: MOT failure rate for its age
13.8% of 24,944 MOT tests of the MG ZS first registered in 2020 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 99.7 (95% CI 96.4–103.1; 100 = normal for this model at that age): the 2020 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 | 13.8 | % | all ages tested | 2019–2024 | 24944 |
| Index against this model at the same age (95% CI 96.4–103.1) | 99.7 | index | 100 = normal for this model at that age | 2019–2024 | 24944 |
| Rank among this model's 4 build years | 1 | of 4 | 1 = fails least for its age | 2019–2024 | 24944 |
| Tested in 2024 | 12536 | tests | median 27,165 miles | 2024 | 12536 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2020 MG ZS fail at each age?
Cars built in 2020 were tested at ages 3 to 4 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 | 12,408 | 11.9 | 11.3–12.5 | 11.9 | 99.9 |
| 4 | 12,536 | 15.6 | 15–16.3 | 15.7 | 99.6 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 24,944 (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 2020 MG ZS?
The most common failure group on cars built in 2020 is brakes: 5.5 items per 100 first tests, against 7.1 across all build years of the MG ZS. These counts are not age-adjusted: cars built in 2020 were tested at ages 3 to 4.
| Failure group | Built 2020, per 100 | All build years, per 100 | Items |
|---|---|---|---|
| Brakes | 5.5 | 7.1 | 1,422 |
| Tyres | 5.3 | 5.5 | 1,367 |
| Lamps, reflectors and electrical equipment | 4.3 | 5.3 | 1,104 |
| Visibility | 3 | 3.3 | 786 |
| Noise, emissions and leaks | 1.4 | 1.4 | 362 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 25,837 (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 2020 compare with the years around it?
Among the 4 published build years of the MG ZS, 2020 ranks 1 (1 = fails least for its age). 2019: index 107.9.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2017 | 108.1 | 95.0–121.2 | no different (rough estimate) | 1,340 |
| 2018 | 104.1 | 100.8–107.4 | worse | 20,225 |
| 2019 | 107.9 | 104.7–111.1 | worse | 25,816 |
| 2020 | 99.7 | 96.4–103.1 | no different | 24,944 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 72,325 (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). MG ZS 2020 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/mg-zs/2020/
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
MG ZS 2017 · MG ZS 2018 · MG ZS 2019 · MG ZS in Norway · MG ZS in the Netherlands · MG ZS by postcode area · MG ZS body, chassis and structure failures · MG ZS brakes failures · MG ZS vehicle identification failures · MG ZS lamps, reflectors and electrics failures · MG ZS noise, emissions and leaks failures · MG ZS road wheels failures · MG ZS seat belts and airbags failures · MG ZS steering failures · MG ZS suspension failures · MG ZS tyres failures · MG ZS visibility failures