Vauxhall Insignia 2018: MOT failure rate for its age

18.0% of 52,433 MOT tests of the Vauxhall Insignia 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 87.9 (95% CI 86.1–89.7; 100 = normal for this model at that age): the 2018 Vauxhall Insignia fails less often than other build years of the same model at the same age.

Vauxhall Insignia built in 2018 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	18.0	%	all ages tested	2019–2024	52433
Index against this model at the same age (95% CI 86.1–89.7)	87.9	index	100 = normal for this model at that age	2019–2024	52433
Rank among this model's 13 build years	1	of 13	1 = fails least for its age	2019–2024	52433
Tested in 2024	12718	tests	median 60,279 miles	2024	12718

Built 2018 against Vauxhall Insignia normal for the age: first-time MOT failure share at each age, age 3: 16.2% vs 16.3%; age 4: 19% vs 19.8%; age 5: 18.5% vs 21.9%; age 6: 18.5% vs 24.2%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2018 Vauxhall Insignia by registration · All Vauxhall Insignia 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 Vauxhall Insignia 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.

Vauxhall Insignia 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	13,502	16.2	15.6–16.9	16.3	99.5
4	13,238	19	18.3–19.6	19.8	95.7
5	12,975	18.5	17.8–19.1	21.9	84.1
6	12,718	18.5	17.9–19.2	24.2	76.5

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 52,433 (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 Vauxhall Insignia?

The most common failure group on cars built in 2018 is tyres: 7.8 items per 100 first tests, against 11.4 across all build years of the Vauxhall Insignia. These counts are not age-adjusted: cars built in 2018 were tested at ages 3 to 6.

Failure items per 100 first tests, Vauxhall Insignia built 2018 against the Vauxhall Insignia in all build years (2019–2024, not age-adjusted)
Failure group	Built 2018, per 100	All build years, per 100	Items
Tyres	7.8	11.4	4,130
Visibility	7.6	8.2	4,031
Brakes	5.8	9.5	3,094
Noise, emissions and leaks	2.8	2.8	1,469
Lamps, reflectors and electrical equipment	2.1	15.2	1,100

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 53,185 (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 13 published build years of the Vauxhall Insignia, 2018 ranks 1 (1 = fails least for its age). 2017: index 90.9. 2019: index 96.1.

Vauxhall Insignia build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2008	92.6	83.4–101.8	no different (rough estimate)	1,112
2009	101.8	100.8–102.9	worse	98,662
2010	99.0	98.1–99.9	better	124,585
2011	98.6	97.8–99.4	better	180,209
2012	101.6	100.7–102.6	worse	144,437
2013	100.6	99.7–101.6	no different	139,082
2014	101.6	100.7–102.5	worse	160,967
2015	101.1	100.2–102.0	worse	180,036
2016	106.8	105.7–107.9	worse	140,214
2017	90.9	89.5–92.2	better	82,528
2018	87.9	86.1–89.7	better	52,433
2019	96.1	93.4–98.9	better	24,926
2020	89.5	81.1–97.9	better (rough estimate)	2,705

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,331,896 (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). Vauxhall Insignia 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/vauxhall-insignia/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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