Dacia Logan 2018: MOT failure rate for its age
23.4% of 7,325 MOT tests of the Dacia Logan 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 102.1 (95% CI 97.3–106.9; 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 | 23.4 | % | all ages tested | 2019–2024 | 7325 |
| Index against this model at the same age (95% CI 97.3–106.9) | 102.1 | index | 100 = normal for this model at that age | 2019–2024 | 7325 |
| Rank among this model's 8 build years | 5 | of 8 | 1 = fails least for its age | 2019–2024 | 7325 |
| Tested in 2024 | 1792 | tests | median 46,275 miles | 2024 | 1792 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2018 Dacia Logan 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 | 1,857 | 20.1 | 18.3–22 | 20.1 | 100.1 |
| 4 | 1,834 | 21.8 | 20–23.8 | 21.7 | 100.5 |
| 5 | 1,842 | 24.9 | 22.9–26.9 | 24.1 | 103.2 |
| 6 | 1,792 | 27.2 | 25.2–29.3 | 26.1 | 104 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 7,325 (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 Dacia Logan?
The most common failure group on cars built in 2018 is lamps, reflectors and electrical equipment: 11.2 items per 100 first tests, against 13.3 across all build years of the Dacia Logan. 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 | 11.2 | 13.3 | 846 |
| Visibility | 9.2 | 9.3 | 697 |
| Tyres | 5.1 | 6.7 | 383 |
| Brakes | 4.8 | 6.5 | 360 |
| Noise, emissions and leaks | 2 | 1.5 | 148 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 7,552 (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 8 published build years of the Dacia Logan, 2018 ranks 5 (1 = fails least for its age). 2017: index 97.8. 2019: index 104.6.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2013 | 91.4 | 85.1–97.7 | better (rough estimate) | 2,706 |
| 2014 | 103.1 | 99.9–106.2 | no different | 13,300 |
| 2015 | 107.3 | 104.5–110.1 | worse | 18,849 |
| 2016 | 94.1 | 91.3–97.0 | better | 17,128 |
| 2017 | 97.8 | 94.2–101.4 | no different | 12,249 |
| 2018 | 102.1 | 97.3–106.9 | no different | 7,325 |
| 2019 | 104.6 | 99.4–109.7 | no different | 7,037 |
| 2020 | 100.6 | 90.1–111.2 | no different (rough estimate) | 1,684 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 80,278 (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). Dacia Logan 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/dacia-logan/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
Dacia Logan 2013 · Dacia Logan 2014 · Dacia Logan 2015 · Dacia Logan 2016 · Dacia Logan 2017 · Dacia Logan 2019 · Dacia Logan 2020 · Dacia Logan in Finland · Dacia Logan in the Netherlands · Dacia Logan by postcode area · Dacia Logan body, chassis and structure failures · Dacia Logan brakes failures · Dacia Logan vehicle identification failures · Dacia Logan lamps, reflectors and electrics failures · Dacia Logan noise, emissions and leaks failures · Dacia Logan road wheels failures · Dacia Logan seat belts and airbags failures · Dacia Logan steering failures · Dacia Logan suspension failures · Dacia Logan tyres failures · Dacia Logan visibility failures