Does the Daihatsu Sirion fail the MOT on brakes more than it should?
The Daihatsu Sirion records 14.70 brakes failure items per 100 initial MOT tests (2019–2024), against 20.34 expected for a car of the same age mix: less than expected for its class and age (−5.64, 95% interval −6.05 to −5.23). It ranks 586 of 712 models on brakes (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on brakes · check a Daihatsu Sirion by registration
What exactly fails on brakes?
The most frequent DVSA defect wording in this group on the Daihatsu Sirion is “Brake pipe damaged or excessively corroded”, recorded 1,827 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Brake pipe damaged or excessively corroded | 1,827 | 3.93 |
| a brake lining or pad worn below 1.5mm | 830 | 1.78 |
| Significant brake effort recorded with no brake applied indicating a binding brake | 581 | 1.25 |
| Parking brake efficiency below minimum requirement | 526 | 1.13 |
| Brake disc or drum significantly and obviously worn | 437 | 0.94 |
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 brakes advisory, how often does it fail next time?
14.6% of Daihatsu Sirion MOTs with a brakes advisory were followed by a fail in the same group at the next MOT, typically 12 months and 3,413 miles later (9,365 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 9,365 (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 body, chassis and structure 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