Hyundai i800 2018: MOT failure rate for its age
33.0% of 4,745 MOT tests of the Hyundai i800 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 104.1 (95% CI 98.9–109.2; 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 | 33.0 | % | all ages tested | 2019–2024 | 4745 |
| Index against this model at the same age (95% CI 98.9–109.2) | 104.1 | index | 100 = normal for this model at that age | 2019–2024 | 4745 |
| Rank among this model's 12 build years | 9 | of 12 | 1 = fails least for its age | 2019–2024 | 4745 |
| Tested in 2024 | 1192 | tests | median 67,154 miles | 2024 | 1192 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2018 Hyundai i800 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 | 1,174 | 31.2 | 28.6–33.9 | 30.2 | 103.3 |
| 4 | 1,197 | 30.5 | 28–33.2 | 30.9 | 98.7 |
| 5 | 1,182 | 33.5 | 30.9–36.2 | 31.5 | 106.4 |
| 6 | 1,192 | 36.7 | 34.1–39.5 | 34.2 | 107.4 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 4,745 (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 i800?
The most common failure group on cars built in 2018 is lamps, reflectors and electrical equipment: 24.6 items per 100 first tests, against 29.1 across all build years of the Hyundai i800. 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 |
|---|---|---|---|
| Lamps, reflectors and electrical equipment | 24.6 | 29.1 | 1,211 |
| Visibility | 9.4 | 10.1 | 463 |
| Brakes | 8.4 | 25.1 | 414 |
| Tyres | 7.4 | 8.2 | 365 |
| Noise, emissions and leaks | 3.7 | 3.1 | 183 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 4,920 (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 12 published build years of the Hyundai i800, 2018 ranks 9 (1 = fails least for its age). 2017: index 94.8. 2019: index 99.7.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2008 | 108.0 | 95.9–120.0 | no different (rough estimate) | 635 |
| 2009 | 104.8 | 95.3–114.3 | no different (rough estimate) | 996 |
| 2010 | 103.3 | 97.9–108.8 | no different (rough estimate) | 3,059 |
| 2011 | 97.0 | 92.1–102.0 | no different (rough estimate) | 3,501 |
| 2012 | 101.1 | 97.2–104.9 | no different | 6,126 |
| 2013 | 84.0 | 76.1–91.9 | better (rough estimate) | 1,264 |
| 2014 | 92.5 | 82.7–102.4 | no different (rough estimate) | 936 |
| 2015 | 101.5 | 90.8–112.3 | no different (rough estimate) | 926 |
| 2016 | 107.9 | 103.6–112.3 | worse | 6,264 |
| 2017 | 94.8 | 90.9–98.7 | better | 7,163 |
| 2018 | 104.1 | 98.9–109.2 | no different | 4,745 |
| 2019 | 99.7 | 94.9–104.5 | no different | 5,439 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 41,054 (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 i800 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-i800/2018/
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 i800 2008 · Hyundai i800 2009 · Hyundai i800 2010 · Hyundai i800 2011 · Hyundai i800 2012 · Hyundai i800 2013 · Hyundai i800 2014 · Hyundai i800 2015 · Hyundai i800 2016 · Hyundai i800 2017 · Hyundai i800 2019 · Hyundai i800 by postcode area · Hyundai i800 body, chassis and structure failures · Hyundai i800 brakes failures · Hyundai i800 vehicle identification failures · Hyundai i800 lamps, reflectors and electrics failures · Hyundai i800 noise, emissions and leaks failures · Hyundai i800 road wheels failures · Hyundai i800 seat belts and airbags failures · Hyundai i800 steering failures · Hyundai i800 suspension failures · Hyundai i800 tyres failures · Hyundai i800 visibility failures