Does the Daihatsu Sirion fail the MOT on seat belts and airbags more than it should?

The Daihatsu Sirion records 1.63 seat belts and airbags failure items per 100 initial MOT tests (2019–2024), against 2.24 expected for a car of the same age mix: less than expected for its class and age (−0.61, 95% interval −0.75 to −0.47). It ranks 472 of 627 models on seat belts and airbags (1 = most failures above expected).

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on seat belts and airbags · check a Daihatsu Sirion by registration

What exactly fails on seat belts and airbags?

The most frequent DVSA defect wording in this group on the Daihatsu Sirion is “The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired”, recorded 463 times in 2019–2024.

Daihatsu Sirion: most frequent seat belts and airbags defect wordings, 2019–2024 (30+ items each)
DVSA defect wording	Items	Per 100 tests
The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired	463	1.00
An SRS malfunction indicator lamp (MIL) indicates a system malfunction	150	0.32
Seat belt not functioning as intended or of an incorrect type	39	0.08
Seat belt buckle missing, damaged or not functioning as intended	36	0.08
Seat belt retractor not functioning as intended	31	0.07

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

Does the Daihatsu Sirion fail the MOT on seat belts and airbags more than it should?

What exactly fails on seat belts and airbags?

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