Toyota Prius+ 2018: MOT failure rate for its age
16.5% of 1,174 MOT tests of the Toyota Prius+ 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 117.0 (95% CI 100.5–133.4; 100 = normal for this model at that age): the 2018 Toyota Prius+ fails more often than other build years of the same model at the same age. This is a rough estimate from a smaller sample.
| Measure | Value | Unit | Compared with | Years | Tests |
|---|---|---|---|---|---|
| Failed first time | 16.5 | % | all ages tested | 2019–2024 | 1174 |
| Index against this model at the same age (95% CI 100.5–133.4) | 117.0 | index | 100 = normal for this model at that age | 2019–2024 | 1174 |
| Rank among this model's 9 build years | 8 | of 9 | 1 = fails least for its age | 2019–2024 | 1174 |
| Tested in 2024 | 340 | tests | median 100,296 miles | 2024 | 340 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2018 Toyota Prius+ 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 | 177 (rough estimate) | 13 | 8.8–18.7 | 10.5 | 124 |
| 4 | 298 (rough estimate) | 14.8 | 11.2–19.2 | 11 | 133.7 |
| 5 | 359 (rough estimate) | 20.1 | 16.2–24.5 | 13.6 | 147.1 |
| 6 | 340 (rough estimate) | 16.2 | 12.6–20.5 | 19.3 | 84 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,174 (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 Toyota Prius+?
The most common failure group on cars built in 2018 is lamps, reflectors and electrical equipment: 6 items per 100 first tests, against 7 across all build years of the Toyota Prius+. 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 | 6 | 7 | 76 |
| Tyres | 3.6 | 3 | 45 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,266 (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 Toyota Prius+, 2018 ranks 8 (1 = fails least for its age). 2017: index 81.0. 2019: index 93.0.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2012 | 106.2 | 94.9–117.6 | no different (rough estimate) | 1,494 |
| 2013 | 106.9 | 98.5–115.2 | no different (rough estimate) | 2,888 |
| 2014 | 101.7 | 92.6–110.9 | no different (rough estimate) | 2,621 |
| 2015 | 98.4 | 88.1–108.7 | no different (rough estimate) | 2,053 |
| 2016 | 94.9 | 85.3–104.5 | no different (rough estimate) | 2,345 |
| 2017 | 81.0 | 68.0–94.0 | better (rough estimate) | 1,088 |
| 2018 | 117.0 | 100.5–133.4 | worse (rough estimate) | 1,174 |
| 2019 | 93.0 | 80.8–105.3 | no different (rough estimate) | 2,058 |
| 2020 | 130.8 | 84.8–176.9 | no different (rough estimate) | 224 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 15,945 (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). Toyota Prius+ 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/toyota-prius-plus/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
Toyota Prius+ 2012 · Toyota Prius+ 2013 · Toyota Prius+ 2014 · Toyota Prius+ 2015 · Toyota Prius+ 2016 · Toyota Prius+ 2017 · Toyota Prius+ 2019 · Toyota Prius+ 2020 · Toyota Prius+ in Norway · Toyota Prius+ in Finland · Toyota Prius+ in the Netherlands · Toyota Prius+ by postcode area · Toyota Prius+ body, chassis and structure failures · Toyota Prius+ brakes failures · Toyota Prius+ lamps, reflectors and electrics failures · Toyota Prius+ steering failures · Toyota Prius+ suspension failures · Toyota Prius+ tyres failures · Toyota Prius+ visibility failures