Seat Leon 2015: MOT failure rate for its age

17.3% of 105,329 MOT tests of the Seat Leon first registered in 2015 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 92.2 (95% CI 90.9–93.6; 100 = normal for this model at that age): the 2015 Seat Leon fails less often than other build years of the same model at the same age.

Seat Leon built in 2015 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	17.3	%	all ages tested	2019–2024	105329
Index against this model at the same age (95% CI 90.9–93.6)	92.2	index	100 = normal for this model at that age	2019–2024	105329
Rank among this model's 21 build years	2	of 21	1 = fails least for its age	2019–2024	105329
Tested in 2024	17072	tests	median 79,103 miles	2024	17072

Built 2015 against Seat Leon normal for the age: first-time MOT failure share at each age, age 4: 13.4% vs 15%; age 5: 15.6% vs 16.1%; age 6: 16% vs 17.6%; age 7: 18.1% vs 19%; age 8: 19.9% vs 21.1%; age 9: 21.1% vs 24.1%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2015 Seat Leon by registration · All Seat Leon 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 2015 Seat Leon fail at each age?

Cars built in 2015 were tested at ages 4 to 9 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 Leon built 2015: 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)
4	18,336	13.4	12.9–13.9	15	89.3
5	17,416	15.6	15–16.1	16.1	96.9
6	17,687	16	15.5–16.6	17.6	91.2
7	17,517	18.1	17.6–18.7	19	95.7
8	17,301	19.9	19.3–20.5	21.1	94
9	17,072	21.1	20.5–21.7	24.1	87.5

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 105,329 (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 2015 Seat Leon?

The most common failure group on cars built in 2015 is tyres: 8.3 items per 100 first tests, against 9.2 across all build years of the Seat Leon. These counts are not age-adjusted: cars built in 2015 were tested at ages 4 to 9.

Failure items per 100 first tests, Seat Leon built 2015 against the Seat Leon in all build years (2019–2024, not age-adjusted)
Failure group	Built 2015, per 100	All build years, per 100	Items
Tyres	8.3	9.2	8,723
Visibility	4.9	6.4	5,121
Brakes	4.7	8.7	4,992
Suspension	4.5	12.5	4,712
Lamps, reflectors and electrical equipment	3	10.1	3,199

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 105,329 (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 2015 compare with the years around it?

Among the 21 published build years of the Seat Leon, 2015 ranks 2 (1 = fails least for its age). 2014: index 91.2. 2016: index 97.7.

Seat Leon build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2000	111.6	100.5–122.7	worse (rough estimate)	820
2001	106.2	100.9–111.6	worse (rough estimate)	3,341
2002	101.6	98.0–105.2	no different	7,003
2003	101.4	98.7–104.1	no different	12,368
2004	98.1	95.7–100.5	no different	15,199
2005	103.0	100.8–105.3	worse	17,970
2006	105.6	103.8–107.4	worse	30,008
2007	99.3	97.8–100.8	no different	40,443
2008	101.6	100.0–103.2	no different	37,877
2009	106.3	104.5–108.0	worse	36,174
2010	108.5	106.8–110.3	worse	40,356
2011	106.1	104.4–107.8	worse	44,258
2012	105.4	103.8–107.0	worse	58,021
2013	96.6	95.1–98.0	better	72,945
2014	91.2	90.0–92.4	better	115,712
2015	92.2	90.9–93.6	better	105,329
2016	97.7	96.2–99.2	better	97,267
2017	94.4	92.9–96.0	better	97,255
2018	103.0	101.3–104.8	worse	85,811
2019	114.7	112.3–117.0	worse	59,282
2020	102.7	99.4–106.1	no different	27,624

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,005,063 (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 Leon 2015 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-leon/2015/

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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