Infiniti Q50 2017: MOT failure rate for its age
14.7% of 2,170 MOT tests of the Infiniti Q50 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 85.0 (95% CI 75.6–94.3; 100 = normal for this model at that age): the 2017 Infiniti Q50 fails less 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 | 14.7 | % | all ages tested | 2019–2024 | 2170 |
| Index against this model at the same age (95% CI 75.6–94.3) | 85.0 | index | 100 = normal for this model at that age | 2019–2024 | 2170 |
| Rank among this model's 5 build years | 1 | of 5 | 1 = fails least for its age | 2019–2024 | 2170 |
| Tested in 2024 | 408 | tests | median 64,927 miles | 2024 | 408 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2017 Infiniti Q50 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 | 505 | 10.3 | 7.9–13.3 | 13 | 79.4 |
| 4 | 421 (rough estimate) | 14.5 | 11.4–18.2 | 17.5 | 82.6 |
| 5 | 419 (rough estimate) | 15.3 | 12.1–19 | 18.7 | 81.8 |
| 6 | 417 (rough estimate) | 16.1 | 12.9–19.9 | 18.8 | 85.3 |
| 7 | 408 (rough estimate) | 18.1 | 14.7–22.2 | 19.1 | 94.8 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 2,170 (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 Infiniti Q50?
The most common failure group on cars built in 2017 is brakes: 8.9 items per 100 first tests, against 12.3 across all build years of the Infiniti Q50. 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 |
|---|---|---|---|
| Brakes | 8.9 | 12.3 | 195 |
| Tyres | 6.7 | 9.8 | 147 |
| Visibility | 3.9 | 5.6 | 85 |
| Suspension | 2.4 | 4.3 | 53 |
| Lamps, reflectors and electrical equipment | 1.8 | 4.8 | 39 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 2,182 (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 5 published build years of the Infiniti Q50, 2017 ranks 1 (1 = fails least for its age). 2016: index 103.8. 2018: index 106.7.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2014 | 106.5 | 97.9–115.0 | no different (rough estimate) | 2,579 |
| 2015 | 100.7 | 94.4–107.1 | no different | 4,733 |
| 2016 | 103.8 | 96.4–111.2 | no different (rough estimate) | 3,960 |
| 2017 | 85.0 | 75.6–94.3 | better (rough estimate) | 2,170 |
| 2018 | 106.7 | 91.7–121.7 | no different (rough estimate) | 1,083 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 14,525 (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). Infiniti Q50 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/infiniti-q50/2017/
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
Infiniti Q50 2014 · Infiniti Q50 2015 · Infiniti Q50 2016 · Infiniti Q50 2018 · Infiniti Q50 by postcode area · Infiniti Q50 body, chassis and structure failures · Infiniti Q50 brakes failures · Infiniti Q50 vehicle identification failures · Infiniti Q50 lamps, reflectors and electrics failures · Infiniti Q50 noise, emissions and leaks failures · Infiniti Q50 road wheels failures · Infiniti Q50 suspension failures · Infiniti Q50 tyres failures · Infiniti Q50 visibility failures