Does the Mazda Demio fail the MOT on body, chassis and structure more than it should?
The Mazda Demio records 37.34 body, chassis and structure failure items per 100 initial MOT tests (2019–2024), against 16.14 expected for a car of the same age mix: more than expected for its class and age (+21.20, 95% interval +19.77 to +22.64). It ranks 8 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 Mazda Demio by registration
What exactly fails on body, chassis and structure?
The most frequent DVSA defect wording in this group on the Mazda Demio is “A transmission shaft constant velocity joint boot severely deteriorated”, recorded 1,083 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| A transmission shaft constant velocity joint boot severely deteriorated | 1,083 | 15.65 |
| A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc | 715 | 10.33 |
| Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced | 334 | 4.83 |
| Body, cab or chassis excessively corroded at a mounting point | 186 | 2.69 |
| Exhaust system leaking or insecure | 58 | 0.84 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 6,922 (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
Other pages for this model
Mazda Demio 2002 · Mazda Demio 2003 · Mazda Demio in the Netherlands · Mazda Demio by postcode area · Mazda Demio brakes failures · Mazda Demio vehicle identification failures · Mazda Demio lamps, reflectors and electrics failures · Mazda Demio noise, emissions and leaks failures · Mazda Demio seat belts and airbags failures · Mazda Demio steering failures · Mazda Demio suspension failures · Mazda Demio tyres failures · Mazda Demio visibility failures