Kia Stonic 2017: MOT failure rate for its age

10.8% of 3,561 MOT tests of the Kia Stonic 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 90.2 (95% CI 81.2–99.2; 100 = normal for this model at that age): the 2017 Kia Stonic fails less often than other build years of the same model at the same age. This is a rough estimate from a smaller sample.

Kia Stonic built in 2017 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	10.8	%	all ages tested	2019–2024	3561
Index against this model at the same age (95% CI 81.2–99.2)	90.2	index	100 = normal for this model at that age	2019–2024	3561
Rank among this model's 4 build years	1	of 4	1 = fails least for its age	2019–2024	3561
Tested in 2024	706	tests	median 45,535 miles	2024	706

Built 2017 against Kia Stonic normal for the age: first-time MOT failure share at each age, age 3: 4.6% vs 7.4%; age 4: 7.9% vs 10.8%; age 5: 10.9% vs 12.9%; age 6: 15.1% vs 14%; age 7: 15.4% vs 14.9%. Axis from 0% to 20%. DVSA MOT bulk data, 2019–2024.

Check a 2017 Kia Stonic by registration · All Kia Stonic 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 Kia Stonic 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.

Kia Stonic 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	694	4.6	3.3–6.4	7.4	62.4
4	718	7.9	6.2–10.1	10.8	73.7
5	715	10.9	8.8–13.4	12.9	84.5
6	728	15.1	12.7–17.9	14	108.2
7	706	15.4	13–18.3	14.9	103.5

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,561 (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 Kia Stonic?

The most common failure group on cars built in 2017 is visibility: 6 items per 100 first tests, against 5.8 across all build years of the Kia Stonic. These counts are not age-adjusted: cars built in 2017 were tested at ages 3 to 7.

Failure items per 100 first tests, Kia Stonic built 2017 against the Kia Stonic in all build years (2019–2024, not age-adjusted)
Failure group	Built 2017, per 100	All build years, per 100	Items
Visibility	6	5.8	214
Brakes	4.6	3.3	164
Tyres	3.3	2.8	118
Lamps, reflectors and electrical equipment	1.3	1.4	48

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,562 (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 Kia Stonic, 2017 ranks 1 (1 = fails least for its age). 2018: index 102.5.

Kia Stonic build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2017	90.2	81.2–99.2	better (rough estimate)	3,561
2018	102.5	98.9–106.1	no different	27,536
2019	102.3	98.3–106.3	no different	24,606
2020	107.7	100.5–114.9	worse	9,179

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 64,882 (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). Kia Stonic 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/kia-stonic/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.

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