Daihatsu Sirion 2010: MOT failure rate for its age
27.8% of 573 MOT tests of the Daihatsu Sirion first registered in 2010 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 95.0 (95% CI 80.2–109.8; 100 = normal for this model at that age): the 2010 build year is no different from other 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 | 27.8 | % | all ages tested | 2019–2024 | 573 |
| Index against this model at the same age (95% CI 80.2–109.8) | 95.0 | index | 100 = normal for this model at that age | 2019–2024 | 573 |
| Rank among this model's 10 build years | 1 | of 10 | 1 = fails least for its age | 2019–2024 | 573 |
| Tested in 2024 | 109 | tests | median 60,686 miles | 2024 | 109 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2010 Daihatsu Sirion fail at each age?
Cars built in 2010 were tested at ages 9 to 14 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) |
|---|---|---|---|---|---|
| 9 | 123 (rough estimate) | 26 | 19.1–34.4 | not available | not available |
| 10 | 118 (rough estimate) | 26.3 | 19.2–34.9 | 26.3 | 99.8 |
| 11 | 120 (rough estimate) | 26.7 | 19.6–35.2 | 27.1 | 98.3 |
| 12 | 114 (rough estimate) | 28.1 | 20.6–36.9 | 29.1 | 96.3 |
| 13 | 112 (rough estimate) | 28.6 | 21–37.5 | 30.9 | 92.3 |
| 14 | 109 (rough estimate) | 29.4 | 21.6–38.5 | 32.9 | 89.2 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 696 (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 2010 Daihatsu Sirion?
The most common failure group on cars built in 2010 is suspension: 14.8 items per 100 first tests, against 25.1 across all build years of the Daihatsu Sirion. These counts are not age-adjusted: cars built in 2010 were tested at ages 9 to 14.
| Failure group | Built 2010, per 100 | All build years, per 100 | Items |
|---|---|---|---|
| Suspension | 14.8 | 25.1 | 103 |
| Brakes | 9.8 | 14.7 | 68 |
| Lamps, reflectors and electrical equipment | 9.3 | 20.9 | 65 |
| Visibility | 8.6 | 10.5 | 60 |
| Tyres | 6.2 | 7.4 | 43 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 696 (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 2010 compare with the years around it?
Among the 10 published build years of the Daihatsu Sirion, 2010 ranks 1 (1 = fails least for its age). 2009: index 95.2.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2001 | 108.8 | 92.5–125.2 | no different (rough estimate) | 358 |
| 2002 | 97.6 | 87.1–108.1 | no different (rough estimate) | 799 |
| 2003 | 98.5 | 88.3–108.7 | no different (rough estimate) | 880 |
| 2004 | 104.8 | 93.9–115.8 | no different (rough estimate) | 847 |
| 2005 | 104.8 | 100.5–109.1 | worse | 5,804 |
| 2006 | 102.0 | 97.6–106.3 | no different | 5,690 |
| 2007 | 99.9 | 96.6–103.3 | no different | 10,014 |
| 2008 | 98.4 | 95.4–101.4 | no different | 12,903 |
| 2009 | 95.2 | 90.7–99.7 | better | 5,986 |
| 2010 | 95.0 | 80.2–109.8 | no different (rough estimate) | 573 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 43,854 (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). Daihatsu Sirion 2010 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/daihatsu-sirion/2010/
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
Daihatsu Sirion 2001 · Daihatsu Sirion 2002 · Daihatsu Sirion 2003 · Daihatsu Sirion 2004 · Daihatsu Sirion 2005 · Daihatsu Sirion 2006 · Daihatsu Sirion 2007 · Daihatsu Sirion 2008 · Daihatsu Sirion 2009 · Daihatsu Sirion in the Netherlands · Daihatsu Sirion by postcode area · Daihatsu Sirion body, chassis and structure failures · Daihatsu Sirion brakes failures · Daihatsu Sirion vehicle identification failures · Daihatsu Sirion lamps, reflectors and electrics failures · Daihatsu Sirion noise, emissions and leaks failures · Daihatsu Sirion seat belts and airbags failures · Daihatsu Sirion steering failures · Daihatsu Sirion suspension failures · Daihatsu Sirion tyres failures · Daihatsu Sirion visibility failures