Alfa Romeo Giulietta 2018: MOT failure rate for its age

14.9% of 3,362 MOT tests of the Alfa Romeo Giulietta 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 93.4 (95% CI 85.3–101.6; 100 = normal for this model at that age): the 2018 build year is no different from other years of the same model at the same age. This is a rough estimate from a smaller sample.

Alfa Romeo Giulietta built in 2018 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	14.9	%	all ages tested	2019–2024	3362
Index against this model at the same age (95% CI 85.3–101.6)	93.4	index	100 = normal for this model at that age	2019–2024	3362
Rank among this model's 11 build years	4	of 11	1 = fails least for its age	2019–2024	3362
Tested in 2024	837	tests	median 42,314 miles	2024	837

Built 2018 against Alfa Romeo Giulietta normal for the age: first-time MOT failure share at each age, age 3: 12.5% vs 12.3%; age 4: 14% vs 14%; age 5: 15.8% vs 17.2%; age 6: 17.4% vs 20.4%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2018 Alfa Romeo Giulietta by registration · All Alfa Romeo Giulietta 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 Alfa Romeo Giulietta 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.

Alfa Romeo Giulietta 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	834	12.5	10.4–14.9	12.3	101
4	849	14	11.8–16.5	14	100.1
5	842	15.8	13.5–18.4	17.2	91.9
6	837	17.4	15–20.2	20.4	85.5

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,362 (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 Alfa Romeo Giulietta?

The most common failure group on cars built in 2018 is tyres: 8.4 items per 100 first tests, against 11.9 across all build years of the Alfa Romeo Giulietta. These counts are not age-adjusted: cars built in 2018 were tested at ages 3 to 6.

Failure items per 100 first tests, Alfa Romeo Giulietta built 2018 against the Alfa Romeo Giulietta in all build years (2019–2024, not age-adjusted)
Failure group	Built 2018, per 100	All build years, per 100	Items
Tyres	8.4	11.9	283
Visibility	4.6	6.2	156
Lamps, reflectors and electrical equipment	3.3	16.5	113
Brakes	2.8	8.1	94
Suspension	1.4	11.3	49

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,389 (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 11 published build years of the Alfa Romeo Giulietta, 2018 ranks 4 (1 = fails least for its age). 2017: index 86.9. 2019: index 92.4.

Alfa Romeo Giulietta build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2010	100.7	97.8–103.7	no different	11,957
2011	106.9	105.1–108.7	worse	35,021
2012	102.6	100.2–104.9	worse	21,908
2013	103.2	100.5–105.8	worse	19,178
2014	93.0	90.4–95.7	better	19,073
2015	95.1	92.1–98.0	better	18,314
2016	93.8	90.5–97.1	better	16,969
2017	86.9	82.0–91.8	better	8,029
2018	93.4	85.3–101.6	no different (rough estimate)	3,362
2019	92.4	79.8–105.1	no different (rough estimate)	1,543
2020	110.1	92.3–127.9	no different (rough estimate)	1,026

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 156,380 (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). Alfa Romeo Giulietta 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/alfa-romeo-giulietta/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