MG GS 2017: MOT failure rate for its age

18.1% of 4,975 MOT tests of the MG GS 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 103.4 (95% CI 96.7–110.2; 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.

MG GS built in 2017 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	18.1	%	all ages tested	2019–2024	4975
Index against this model at the same age (95% CI 96.7–110.2)	103.4	index	100 = normal for this model at that age	2019–2024	4975
Rank among this model's 4 build years	2	of 4	1 = fails least for its age	2019–2024	4975
Tested in 2024	946	tests	median 48,128 miles	2024	946

Built 2017 against MG GS normal for the age: first-time MOT failure share at each age, age 3: 9% vs 10.8%; age 4: 14.2% vs 13.3%; age 5: 20.4% vs 19%; age 6: 21.9% vs 21.8%; age 7: 27.4% vs 24.4%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2017 MG GS by registration · All MG GS 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 2017 MG GS 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.

MG GS built 2017: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
Age	Tests	Failed, %	95% interval	Normal for this model at that age, %	Index (100 = normal)
3	1,205	9	7.5–10.7	10.8	83
4	934	14.2	12.1–16.6	13.3	107.4
5	950	20.4	18–23.1	19	107.5
6	940	21.9	19.4–24.7	21.8	100.5
7	946	27.4	24.6–30.3	24.4	112.2

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 4,975 (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 MG GS?

The most common failure group on cars built in 2017 is brakes: 8 items per 100 first tests, against 7.6 across all build years of the MG GS. These counts are not age-adjusted: cars built in 2017 were tested at ages 3 to 7.

Failure items per 100 first tests, MG GS built 2017 against the MG GS in all build years (2019–2024, not age-adjusted)
Failure group	Built 2017, per 100	All build years, per 100	Items
Brakes	8	7.6	399
Tyres	6.4	5.9	320
Lamps, reflectors and electrical equipment	6.2	6.8	308
Visibility	3.7	3.5	184
Noise, emissions and leaks	2.2	1.8	111

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 4,996 (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 4 published build years of the MG GS, 2017 ranks 2 (1 = fails least for its age). 2016: index 95.6. 2018: index 107.0.

MG GS build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2016	95.6	88.2–103.1	no different (rough estimate)	3,402
2017	103.4	96.7–110.2	no different	4,975
2018	107.0	98.9–115.2	no different (rough estimate)	3,830
2019	134.3	116.4–152.2	worse (rough estimate)	1,148

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 13,355 (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 GS 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/mg-gs/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

MG GS 2016 · MG GS 2018 · MG GS 2019 · MG GS by postcode area · MG GS body, chassis and structure failures · MG GS brakes failures · MG GS vehicle identification failures · MG GS lamps, reflectors and electrics failures · MG GS noise, emissions and leaks failures · MG GS seat belts and airbags failures · MG GS suspension failures · MG GS tyres failures · MG GS visibility failures