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MG ZS 2018: MOT failure rate for its age

18.5% of 20,225 MOT tests of the MG ZS first registered in 2018 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 104.1 (95% CI 100.8–107.4; 100 = normal for this model at that age): close to other build years of the same model at the same age (within 5 points of normal).

MG ZS built in 2018 at a glance
MeasureValueUnitCompared withYearsTests
Failed first time18.5%all ages tested2019–202420225
Index against this model at the same age (95% CI 100.8–107.4)104.1index100 = normal for this model at that age2019–202420225
Rank among this model's 4 build years2of 41 = fails least for its age2019–202420225
Tested in 20245082testsmedian 38,990 miles20245082
line · MG ZS built 2018 · first-time MOT failure share by age · built 2018 13.3% vs model normal 12.3% at age 3 · 2019–2024
Built 2018 against MG ZS normal for the age: first-time MOT failure share at each age, age 3: 13.3% vs 12.3%; age 4: 16.1% vs 15.7%; age 5: 20.1% vs 19.5%; age 6: 24.2% vs 23.4%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.
Check a 2018 MG ZS by registration · All MG ZS MOT statistics · Download the build-year table (CSV)

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).

How does the 2018 MG ZS fail at each age?

Cars built in 2018 were tested at ages 3 to 6 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.

MG ZS built 2018: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
AgeTestsFailed, %95% intervalNormal for this model at that age, %Index (100 = normal)
34,99413.312.4–14.312.3108.5
45,06316.115.1–17.215.7102.8
55,08620.119.1–21.319.5103.2
65,08224.223.1–25.423.4103.5

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 20,225 (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 2018 MG ZS?

The most common failure group on cars built in 2018 is brakes: 10.6 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 2018 were tested at ages 3 to 6.

Failure items per 100 first tests, MG ZS built 2018 against the MG ZS in all build years (2019–2024, not age-adjusted)
Failure groupBuilt 2018, per 100All build years, per 100Items
Brakes10.67.12,154
Lamps, reflectors and electrical equipment6.45.31,296
Tyres65.51,223
Visibility3.53.3714
Suspension2.31.4472

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 20,307 (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 2018 compare with the years around it?

Among the 4 published build years of the MG ZS, 2018 ranks 2 (1 = fails least for its age). 2017: index 108.1. 2019: index 107.9.

MG ZS build years: index against the model at the same age (2019–2024)
Build yearIndex (100 = normal)95% intervalVerdictTests
2017108.195.0–121.2no different (rough estimate)1,340
2018104.1100.8–107.4worse20,225
2019107.9104.7–111.1worse25,816
202099.796.4–103.1no different24,944

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 2018 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/2018/

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 2019 · MG ZS 2020 · 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