MOT Risk Index.co.uk

LTI TX4 2015: MOT failure rate for its age

34.7% of 12,066 MOT tests of the LTI TX4 first registered in 2015 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 95.2 (95% CI 92.3–98.0; 100 = normal for this model at that age): close to other build years of the same model at the same age (within 5 points of normal).

LTI TX4 built in 2015 at a glance
MeasureValueUnitCompared withYearsTests
Failed first time34.7%all ages tested2019–202412066
Index against this model at the same age (95% CI 92.3–98.0)95.2index100 = normal for this model at that age2019–202412066
Rank among this model's 12 build years3of 121 = fails least for its age2019–202412066
Tested in 20242080testsmedian 187,376 miles20242080
line · LTI TX4 built 2015 · first-time MOT failure share by age · built 2015 34% vs model normal 34.5% at age 4 · 2019–2024
Built 2015 against LTI TX4 normal for the age: first-time MOT failure share at each age, age 4: 34% vs 34.5%; age 5: 30.9% vs 36%; age 6: 34.7% vs 36.2%; age 7: 37.2% vs 35.5%; age 8: 33.8% vs 38.1%; age 9: 36.8% vs 38.4%. Axis from 0% to 40%. DVSA MOT bulk data, 2019–2024.
Check a 2015 LTI TX4 by registration · All LTI TX4 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 2015 LTI TX4 fail at each age?

Cars built in 2015 were tested at ages 4 to 9 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.

LTI TX4 built 2015: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
AgeTestsFailed, %95% intervalNormal for this model at that age, %Index (100 = normal)
42,1803432–3634.598.4
51,59830.928.6–33.23685.6
62,00434.732.6–36.836.295.8
72,09837.235.2–39.335.5105
82,10633.831.8–35.838.188.6
92,08036.834.8–38.938.495.8

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 12,066 (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 2015 LTI TX4?

The most common failure group on cars built in 2015 is suspension: 24.8 items per 100 first tests, against 31.8 across all build years of the LTI TX4. These counts are not age-adjusted: cars built in 2015 were tested at ages 4 to 9.

Failure items per 100 first tests, LTI TX4 built 2015 against the LTI TX4 in all build years (2019–2024, not age-adjusted)
Failure groupBuilt 2015, per 100All build years, per 100Items
Suspension24.831.82,993
Lamps, reflectors and electrical equipment1523.11,814
Brakes9.616.51,162
Visibility6.37.5761
Noise, emissions and leaks4.56.6544

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 12,066 (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 2015 compare with the years around it?

Among the 12 published build years of the LTI TX4, 2015 ranks 3 (1 = fails least for its age). 2014: index 106.1. 2016: index 91.7.

LTI TX4 build years: index against the model at the same age (2019–2024)
Build yearIndex (100 = normal)95% intervalVerdictTests
200697.389.0–105.6no different (rough estimate)1,300
200798.195.1–101.1no different10,082
200899.996.2–103.5no different7,092
200998.595.1–101.9no different8,282
201099.996.8–103.0no different9,839
2011103.6100.5–106.8worse10,139
201299.796.1–103.3no different7,530
2013101.998.2–105.7no different7,183
2014106.1103.2–108.9worse13,139
201595.292.3–98.0better12,066
201691.788.4–94.9better9,370
201791.887.3–96.4better5,131

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 101,153 (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). LTI TX4 2015 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/london-taxis-int-tx4/2015/

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

LTI TX4 2006 · LTI TX4 2007 · LTI TX4 2008 · LTI TX4 2009 · LTI TX4 2010 · LTI TX4 2011 · LTI TX4 2012 · LTI TX4 2013 · LTI TX4 2014 · LTI TX4 2016 · LTI TX4 2017 · LTI TX4 by postcode area · LTI TX4 body, chassis and structure failures · LTI TX4 brakes failures · LTI TX4 vehicle identification failures · LTI TX4 lamps, reflectors and electrics failures · LTI TX4 noise, emissions and leaks failures · LTI TX4 road wheels failures · LTI TX4 seat belts and airbags failures · LTI TX4 steering failures · LTI TX4 suspension failures · LTI TX4 tyres failures · LTI TX4 visibility failures