Seat Ibiza 2018: MOT failure rate for its age

17.4% of 52,506 MOT tests of the Seat Ibiza 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 92.5 (95% CI 90.6–94.4; 100 = normal for this model at that age): the 2018 Seat Ibiza fails less often than other build years of the same model at the same age.

Seat Ibiza built in 2018 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	17.4	%	all ages tested	2019–2024	52506
Index against this model at the same age (95% CI 90.6–94.4)	92.5	index	100 = normal for this model at that age	2019–2024	52506
Rank among this model's 22 build years	5	of 22	1 = fails least for its age	2019–2024	52506
Tested in 2024	12985	tests	median 43,050 miles	2024	12985

Built 2018 against Seat Ibiza normal for the age: first-time MOT failure share at each age, age 3: 11% vs 12.1%; age 4: 13.2% vs 16.3%; age 5: 20.6% vs 21.2%; age 6: 24.9% vs 25.6%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2018 Seat Ibiza by registration · All Seat Ibiza 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 Seat Ibiza 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.

Seat Ibiza built 2018: 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	13,381	11	10.5–11.5	12.1	90.7
4	13,151	13.2	12.6–13.8	16.3	80.6
5	12,989	20.6	19.9–21.3	21.2	97
6	12,985	24.9	24.2–25.7	25.6	97.2

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 52,506 (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 Seat Ibiza?

The most common failure group on cars built in 2018 is steering: 11 items per 100 first tests, against 4.8 across all build years of the Seat Ibiza. These counts are not age-adjusted: cars built in 2018 were tested at ages 3 to 6.

Failure items per 100 first tests, Seat Ibiza built 2018 against the Seat Ibiza in all build years (2019–2024, not age-adjusted)
Failure group	Built 2018, per 100	All build years, per 100	Items
Steering	11	4.8	5,866
Tyres	7	11.2	3,739
Visibility	4.3	9.7	2,305
Brakes	3.6	14.7	1,912
Lamps, reflectors and electrical equipment	2.8	15	1,481

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 53,155 (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 22 published build years of the Seat Ibiza, 2018 ranks 5 (1 = fails least for its age). 2017: index 104.2. 2019: index 76.1.

Seat Ibiza build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
1999	76.0	64.6–87.4	better (rough estimate)	432
2000	87.3	78.5–96.2	better (rough estimate)	833
2001	89.5	83.5–95.5	better (rough estimate)	1,845
2002	95.6	91.7–99.6	better	4,551
2003	101.3	98.9–103.8	no different	12,836
2004	99.7	97.5–101.9	no different	15,289
2005	101.9	99.9–104.0	no different	18,488
2006	100.9	99.2–102.5	no different	29,438
2007	106.9	105.4–108.4	worse	37,647
2008	108.1	106.7–109.5	worse	45,554
2009	101.0	99.8–102.2	no different	64,787
2010	97.2	96.1–98.3	better	74,696
2011	95.9	94.9–96.9	better	92,290
2012	95.7	94.6–96.8	better	88,098
2013	101.5	100.4–102.5	worse	103,511
2014	100.4	99.4–101.4	no different	120,529
2015	103.7	102.6–104.9	worse	110,437
2016	105.5	104.2–106.7	worse	111,754
2017	104.2	102.6–105.7	worse	83,203
2018	92.5	90.6–94.4	better	52,506
2019	76.1	73.9–78.2	better	39,592
2020	92.6	88.7–96.5	better	16,691

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,125,007 (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 Ibiza 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/seat-ibiza/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.

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