Seat Ibiza 1999: MOT failure rate for its age

39.4% of 432 MOT tests of the Seat Ibiza first registered in 1999 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 76.0 (95% CI 64.6–87.4; 100 = normal for this model at that age): the 1999 Seat Ibiza fails less often than other build years of the same model at the same age. This is a rough estimate from a smaller sample.

Seat Ibiza built in 1999 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	39.4	%	all ages tested	2019–2024	432
Index against this model at the same age (95% CI 64.6–87.4)	76.0	index	100 = normal for this model at that age	2019–2024	432
Rank among this model's 22 build years	1	of 22	1 = fails least for its age	2019–2024	432
Tested in 2024	7	tests	median 121,139 miles	2024	7

Built 1999 against Seat Ibiza normal for the age: first-time MOT failure share at each age, age 20: 38.5% vs 53.9%; age 21: 40.5% vs 49%; age 22: 39.1% vs n/a%. Axis from 0% to 60%. DVSA MOT bulk data, 2019–2024.

Check a 1999 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 1999 Seat Ibiza fail at each age?

Cars built in 1999 were tested at ages 20 to 22 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 1999: 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)
20	247 (rough estimate)	38.5	32.6–44.7	53.9	71.4
21	185 (rough estimate)	40.5	33.7–47.7	49	82.7
22	138 (rough estimate)	39.1	31.4–47.5	not available	not available

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 570 (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 1999 Seat Ibiza?

The most common failure group on cars built in 1999 is brakes: 25 items per 100 first tests, against 14.7 across all build years of the Seat Ibiza. These counts are not age-adjusted: cars built in 1999 were tested at ages 20 to 22.

Failure items per 100 first tests, Seat Ibiza built 1999 against the Seat Ibiza in all build years (2019–2024, not age-adjusted)
Failure group	Built 1999, per 100	All build years, per 100	Items
Brakes	25	14.7	200
Lamps, reflectors and electrical equipment	23.2	15	186
Suspension	18.4	16.6	147
Noise, emissions and leaks	15	4.6	120
Visibility	13.5	9.7	108

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 801 (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 1999 compare with the years around it?

Among the 22 published build years of the Seat Ibiza, 1999 ranks 1 (1 = fails least for its age). 2000: index 87.3.

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 1999 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/1999/

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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