Does the Daihatsu Sirion fail the MOT on body, chassis and structure more than it should?
The Daihatsu Sirion records 11.41 body, chassis and structure failure items per 100 initial MOT tests (2019–2024), against 11.44 expected for a car of the same age mix: about as expected for its class and age (the difference is within its interval or under 0.5 items per 100 tests) (−0.03, 95% interval −0.34 to +0.27). It ranks 273 of 663 models on body, chassis and structure (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on body, chassis and structure · check a Daihatsu Sirion by registration
What exactly fails on body, chassis and structure?
The most frequent DVSA defect wording in this group on the Daihatsu Sirion is “A transmission shaft constant velocity joint boot severely deteriorated”, recorded 1,909 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| A transmission shaft constant velocity joint boot severely deteriorated | 1,909 | 4.10 |
| Exhaust system leaking or insecure | 1,012 | 2.18 |
| A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc | 810 | 1.74 |
| Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced | 578 | 1.24 |
| Body, cab or chassis excessively corroded at a mounting point | 400 | 0.86 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 46,528 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
If a Daihatsu Sirion gets a body, chassis and structure advisory, how often does it fail next time?
18.9% of Daihatsu Sirion MOTs with a body, chassis and structure advisory were followed by a fail in the same group at the next MOT, typically 12 months and 3,800 miles later (2,443 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 2,443 (advisories followed) · Method: the same vehicles followed to their next ordinary MOT · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
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 2010 · Daihatsu Sirion in the Netherlands · Daihatsu Sirion by postcode area · 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