Does the Toyota iQ fail the MOT on body, chassis and structure more than it should?
The Toyota iQ records 1.67 body, chassis and structure failure items per 100 initial MOT tests (2019–2024), against 6.31 expected for a car of the same age mix: less than expected for its class and age (−4.64, 95% interval −4.79 to −4.48). It ranks 540 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 Toyota iQ by registration
What exactly fails on body, chassis and structure?
The most frequent DVSA defect wording in this group on the Toyota iQ is “A transmission shaft constant velocity joint boot severely deteriorated”, recorded 509 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| A transmission shaft constant velocity joint boot severely deteriorated | 509 | 0.49 |
| Exhaust system leaking or insecure | 479 | 0.46 |
| A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc | 185 | 0.18 |
| Bumper insecure or with damage likely to cause injury when grazed or contacted | 146 | 0.14 |
| A body panel or body component damaged or corroded and likely to cause injury when grazed or contacted, or insecure | 79 | 0.08 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 103,601 (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 Toyota iQ gets a body, chassis and structure advisory, how often does it fail next time?
5.8% of Toyota iQ 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 5,318 miles later (2,586 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 2,586 (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
Toyota iQ 2009 · Toyota iQ 2010 · Toyota iQ 2011 · Toyota iQ 2012 · Toyota iQ 2013 · Toyota iQ 2014 · Toyota iQ in Norway · Toyota iQ in the Netherlands · Toyota iQ by postcode area · Toyota iQ brakes failures · Toyota iQ vehicle identification failures · Toyota iQ lamps, reflectors and electrics failures · Toyota iQ noise, emissions and leaks failures · Toyota iQ road wheels failures · Toyota iQ seat belts and airbags failures · Toyota iQ steering failures · Toyota iQ suspension failures · Toyota iQ tyres failures · Toyota iQ visibility failures