Hyundai i40 2018: MOT failure rate for its age
17.6% of 4,824 MOT tests of the Hyundai i40 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 97.1 (95% CI 90.5–103.6; 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.
| Measure | Value | Unit | Compared with | Years | Tests |
|---|---|---|---|---|---|
| Failed first time | 17.6 | % | all ages tested | 2019–2024 | 4824 |
| Index against this model at the same age (95% CI 90.5–103.6) | 97.1 | index | 100 = normal for this model at that age | 2019–2024 | 4824 |
| Rank among this model's 9 build years | 5 | of 9 | 1 = fails least for its age | 2019–2024 | 4824 |
| Tested in 2024 | 1171 | tests | median 71,766 miles | 2024 | 1171 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2018 Hyundai i40 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.
| Age | Tests | Failed, % | 95% interval | Normal for this model at that age, % | Index (100 = normal) |
|---|---|---|---|---|---|
| 3 | 1,241 | 15.6 | 13.7–17.8 | 13.2 | 118.3 |
| 4 | 1,228 | 17.3 | 15.3–19.6 | 17.2 | 101 |
| 5 | 1,184 | 18.7 | 16.5–21 | 19.9 | 93.6 |
| 6 | 1,171 | 18.7 | 16.6–21 | 22.3 | 83.8 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 4,824 (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 Hyundai i40?
The most common failure group on cars built in 2018 is tyres: 7.4 items per 100 first tests, against 9.3 across all build years of the Hyundai i40. These counts are not age-adjusted: cars built in 2018 were tested at ages 3 to 6.
| Failure group | Built 2018, per 100 | All build years, per 100 | Items |
|---|---|---|---|
| Tyres | 7.4 | 9.3 | 383 |
| Visibility | 6 | 6.6 | 310 |
| Brakes | 4.8 | 12.6 | 246 |
| Lamps, reflectors and electrical equipment | 4.6 | 10 | 237 |
| Suspension | 1.9 | 5.3 | 97 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,163 (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 9 published build years of the Hyundai i40, 2018 ranks 5 (1 = fails least for its age). 2017: index 80.5. 2019: index 96.3.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2011 | 107.3 | 101.7–112.9 | worse (rough estimate) | 3,903 |
| 2012 | 109.2 | 106.7–111.7 | worse | 21,682 |
| 2013 | 111.0 | 108.2–113.8 | worse | 18,497 |
| 2014 | 103.9 | 101.4–106.5 | worse | 23,236 |
| 2015 | 95.8 | 93.2–98.3 | better | 22,899 |
| 2016 | 88.0 | 85.3–90.6 | better | 22,325 |
| 2017 | 80.5 | 77.2–83.9 | better | 14,348 |
| 2018 | 97.1 | 90.5–103.6 | no different | 4,824 |
| 2019 | 96.3 | 83.9–108.6 | no different (rough estimate) | 1,449 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 133,163 (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). Hyundai i40 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/hyundai-i40/2018/
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
Hyundai i40 2011 · Hyundai i40 2012 · Hyundai i40 2013 · Hyundai i40 2014 · Hyundai i40 2015 · Hyundai i40 2016 · Hyundai i40 2017 · Hyundai i40 2019 · Hyundai i40 in Norway · Hyundai i40 in Finland · Hyundai i40 in the Netherlands · Hyundai i40 by postcode area · Hyundai i40 body, chassis and structure failures · Hyundai i40 brakes failures · Hyundai i40 vehicle identification failures · Hyundai i40 lamps, reflectors and electrics failures · Hyundai i40 noise, emissions and leaks failures · Hyundai i40 road wheels failures · Hyundai i40 seat belts and airbags failures · Hyundai i40 steering failures · Hyundai i40 suspension failures · Hyundai i40 tyres failures · Hyundai i40 visibility failures