Lexus CT 2017: MOT failure rate for its age
9.7% of 15,524 MOT tests of the Lexus CT first registered in 2017 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 83.5–92.4; 100 = normal for this model at that age): the 2017 Lexus CT fails less often than other build years of the same model at the same age.
| Measure | Value | Unit | Compared with | Years | Tests |
|---|---|---|---|---|---|
| Failed first time | 9.7 | % | all ages tested | 2019–2024 | 15524 |
| Index against this model at the same age (95% CI 83.5–92.4) | 87.9 | index | 100 = normal for this model at that age | 2019–2024 | 15524 |
| Rank among this model's 10 build years | 2 | of 10 | 1 = fails least for its age | 2019–2024 | 15524 |
| Tested in 2024 | 2945 | tests | median 48,324 miles | 2024 | 2945 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2017 Lexus CT fail at each age?
Cars built in 2017 were tested at ages 3 to 7 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.
| Age | Tests | Failed, % | 95% interval | Normal for this model at that age, % | Index (100 = normal) |
|---|---|---|---|---|---|
| 3 | 3,665 | 5.6 | 4.9–6.4 | 6.8 | 82.6 |
| 4 | 2,943 | 9.4 | 8.4–10.6 | 10.5 | 90.3 |
| 5 | 2,985 | 10.7 | 9.6–11.8 | 11.4 | 93.8 |
| 6 | 2,986 | 11.3 | 10.2–12.4 | 13.2 | 85.4 |
| 7 | 2,945 | 12.4 | 11.2–13.6 | 14.2 | 86.9 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 15,524 (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 2017 Lexus CT?
The most common failure group on cars built in 2017 is visibility: 4.3 items per 100 first tests, against 5.3 across all build years of the Lexus CT. These counts are not age-adjusted: cars built in 2017 were tested at ages 3 to 7.
| Failure group | Built 2017, per 100 | All build years, per 100 | Items |
|---|---|---|---|
| Visibility | 4.3 | 5.3 | 666 |
| Tyres | 4.2 | 6.1 | 653 |
| Brakes | 1.5 | 3.7 | 227 |
| Lamps, reflectors and electrical equipment | 1.2 | 6 | 182 |
| Body, chassis, structure | 0.2 | 0.5 | 39 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 15,617 (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 2017 compare with the years around it?
Among the 10 published build years of the Lexus CT, 2017 ranks 2 (1 = fails least for its age). 2016: index 93.1. 2018: index 93.0.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2011 | 105.5 | 102.5–108.5 | worse | 22,789 |
| 2012 | 106.7 | 103.7–109.6 | worse | 25,535 |
| 2013 | 119.8 | 116.3–123.4 | worse | 22,304 |
| 2014 | 87.1 | 84.0–90.2 | better | 22,927 |
| 2015 | 93.7 | 90.2–97.1 | better | 21,232 |
| 2016 | 93.1 | 89.1–97.2 | better | 17,873 |
| 2017 | 87.9 | 83.5–92.4 | better | 15,524 |
| 2018 | 93.0 | 87.5–98.6 | better | 11,044 |
| 2019 | 97.8 | 89.5–106.2 | no different | 5,812 |
| 2020 | 96.2 | 83.0–109.4 | no different (rough estimate) | 2,559 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 167,599 (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 CT 2017 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-ct/2017/
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
Lexus CT 2011 · Lexus CT 2012 · Lexus CT 2013 · Lexus CT 2014 · Lexus CT 2015 · Lexus CT 2016 · Lexus CT 2018 · Lexus CT 2019 · Lexus CT 2020 · Lexus CT in Finland · Lexus CT by postcode area · Lexus CT body, chassis and structure failures · Lexus CT brakes failures · Lexus CT vehicle identification failures · Lexus CT lamps, reflectors and electrics failures · Lexus CT noise, emissions and leaks failures · Lexus CT road wheels failures · Lexus CT seat belts and airbags failures · Lexus CT steering failures · Lexus CT suspension failures · Lexus CT tyres failures · Lexus CT visibility failures