Citroen C4 2018: MOT failure rate for its age

19.1% of 11,084 MOT tests of the Citroen C4 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 86.3 (95% CI 82.7–90.0; 100 = normal for this model at that age): the 2018 Citroen C4 fails less often than other build years of the same model at the same age.

Citroen C4 built in 2018 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	19.1	%	all ages tested	2019–2024	11084
Index against this model at the same age (95% CI 82.7–90.0)	86.3	index	100 = normal for this model at that age	2019–2024	11084
Rank among this model's 17 build years	2	of 17	1 = fails least for its age	2019–2024	11084
Tested in 2024	2755	tests	median 45,892 miles	2024	2755

Built 2018 against Citroen C4 normal for the age: first-time MOT failure share at each age, age 3: 14.9% vs 17.2%; age 4: 17.7% vs 20.7%; age 5: 20.3% vs 23.7%; age 6: 23.5% vs 26.9%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2018 Citroen C4 by registration · All Citroen C4 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 Citroen C4 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.

Citroen C4 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	2,790	14.9	13.6–16.3	17.2	86.4
4	2,772	17.7	16.3–19.2	20.7	85.6
5	2,767	20.3	18.9–21.9	23.7	85.8
6	2,755	23.5	21.9–25.1	26.9	87.3

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 11,084 (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 Citroen C4?

The most common failure group on cars built in 2018 is lamps, reflectors and electrical equipment: 7.5 items per 100 first tests, against 30.6 across all build years of the Citroen C4. These counts are not age-adjusted: cars built in 2018 were tested at ages 3 to 6.

Failure items per 100 first tests, Citroen C4 built 2018 against the Citroen C4 in all build years (2019–2024, not age-adjusted)
Failure group	Built 2018, per 100	All build years, per 100	Items
Lamps, reflectors and electrical equipment	7.5	30.6	857
Tyres	7.3	11.3	834
Brakes	7.3	13.5	829
Visibility	3.9	9.2	438
Body, chassis, structure	1.9	9.7	220

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 11,367 (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 17 published build years of the Citroen C4, 2018 ranks 2 (1 = fails least for its age). 2017: index 86.2. 2019: index 90.0.

Citroen C4 build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2004	110.3	98.5–122.1	no different (rough estimate)	578
2005	100.1	98.0–102.2	no different	16,154
2006	98.9	97.3–100.6	no different	25,913
2007	98.2	97.2–99.2	better	72,595
2008	102.2	101.2–103.2	worse	82,482
2009	102.8	101.5–104.1	worse	48,969
2010	106.8	105.5–108.2	worse	49,455
2011	94.7	93.4–96.0	better	50,421
2012	97.6	96.3–98.9	better	56,354
2013	102.8	101.7–104.0	worse	78,352
2014	98.7	97.8–99.7	better	129,227
2015	98.6	97.8–99.5	better	171,698
2016	100.2	99.1–101.4	no different	109,656
2017	86.2	81.1–91.4	better	5,323
2018	86.3	82.7–90.0	better	11,084
2019	90.0	86.6–93.4	better	14,545
2020	98.1	71.2–125.1	no different (rough estimate)	278

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 923,084 (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). Citroen C4 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/citroen-c4/2018/

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.

Other pages for this model