Lexus NX 2018: MOT failure rate for its age

7.8% of 17,996 MOT tests of the Lexus NX 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 103.0 (95% CI 97.6–108.4; 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.

Lexus NX built in 2018 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	7.8	%	all ages tested	2019–2024	17996
Index against this model at the same age (95% CI 97.6–108.4)	103.0	index	100 = normal for this model at that age	2019–2024	17996
Rank among this model's 7 build years	5	of 7	1 = fails least for its age	2019–2024	17996
Tested in 2024	4370	tests	median 43,110 miles	2024	4370

Built 2018 against Lexus NX normal for the age: first-time MOT failure share at each age, age 3: 6% vs 5.7%; age 4: 5.8% vs 6.5%; age 5: 8.5% vs 8.5%; age 6: 11.3% vs 10%. Axis from 0% to 20%. DVSA MOT bulk data, 2019–2024.

Check a 2018 Lexus NX by registration · All Lexus NX 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 Lexus NX 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.

Lexus NX 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	4,618	6	5.3–6.7	5.7	104.5
4	4,537	5.8	5.2–6.6	6.5	90.1
5	4,471	8.5	7.7–9.4	8.5	100.5
6	4,370	11.3	10.4–12.2	10	112.9

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 17,996 (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 Lexus NX?

The most common failure group on cars built in 2018 is visibility: 3.9 items per 100 first tests, against 4.1 across all build years of the Lexus NX. These counts are not age-adjusted: cars built in 2018 were tested at ages 3 to 6.

Failure items per 100 first tests, Lexus NX built 2018 against the Lexus NX in all build years (2019–2024, not age-adjusted)
Failure group	Built 2018, per 100	All build years, per 100	Items
Visibility	3.9	4.1	701
Tyres	3.7	3.6	669
Brakes	1	1.2	174
Suspension	0.9	1.7	163
Lamps, reflectors and electrical equipment	0.6	0.7	100

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 18,163 (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 7 published build years of the Lexus NX, 2018 ranks 5 (1 = fails least for its age). 2017: index 96.9. 2019: index 104.5.

Lexus NX build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2014	97.1	88.9–105.3	no different	4,902
2015	101.2	96.7–105.6	no different	18,668
2016	101.1	96.8–105.5	no different	22,409
2017	96.9	92.1–101.6	no different	19,815
2018	103.0	97.6–108.4	no different	17,996
2019	104.5	98.0–111.1	no different	13,722
2020	111.1	101.8–120.3	worse	8,328

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 105,840 (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). Lexus NX 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/lexus-nx/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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