Seat Arona 2017: MOT failure rate for its age

18.0% of 3,054 MOT tests of the Seat Arona 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 103.7 (95% CI 95.0–112.3; 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. This is a rough estimate from a smaller sample.

Seat Arona built in 2017 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	18.0	%	all ages tested	2019–2024	3054
Index against this model at the same age (95% CI 95.0–112.3)	103.7	index	100 = normal for this model at that age	2019–2024	3054
Rank among this model's 4 build years	2	of 4	1 = fails least for its age	2019–2024	3054
Tested in 2024	626	tests	median 43,185 miles	2024	626

Built 2017 against Seat Arona normal for the age: first-time MOT failure share at each age, age 3: 7.6% vs 10.9%; age 4: 9.4% vs 11.4%; age 5: 16.6% vs 15.2%; age 6: 27.4% vs 21.6%; age 7: 28.1% vs 27.2%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2017 Seat Arona by registration · All Seat Arona 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 Seat Arona 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.

Seat Arona 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	579	7.6	5.7–10	10.9	69.9
4	608	9.4	7.3–12	11.4	81.9
5	625	16.6	13.9–19.8	15.2	109.6
6	616	27.4	24.1–31.1	21.6	127.1
7	626	28.1	24.7–31.8	27.2	103.5

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,054 (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 Seat Arona?

The most common failure group on cars built in 2017 is steering: 22.2 items per 100 first tests, against 5.3 across all build years of the Seat Arona. These counts are not age-adjusted: cars built in 2017 were tested at ages 3 to 7.

Failure items per 100 first tests, Seat Arona built 2017 against the Seat Arona in all build years (2019–2024, not age-adjusted)
Failure group	Built 2017, per 100	All build years, per 100	Items
Steering	22.2	5.3	679
Tyres	8.8	6.1	269
Brakes	4.8	5.6	148
Visibility	2.7	2.8	81
Suspension	2	0.5	61

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,055 (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 Seat Arona, 2017 ranks 2 (1 = fails least for its age). 2018: index 104.3.

Seat Arona build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2017	103.7	95.0–112.3	no different (rough estimate)	3,054
2018	104.3	101.9–106.7	worse	48,781
2019	96.6	94.0–99.2	better	44,793
2020	105.2	101.0–109.4	worse	21,659

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 118,287 (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). Seat Arona 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/seat-arona/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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