Does the Ford Sierra fail the MOT on body, chassis and structure more than it should?
The Ford Sierra records 8.86 body, chassis and structure failure items per 100 initial MOT tests (2019–2024), against 15.07 expected for a car of the same age mix: less than expected for its class and age (−6.21, 95% interval −6.78 to −5.64). It ranks 573 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 Ford Sierra by registration
What exactly fails on body, chassis and structure?
The most frequent DVSA defect wording in this group on the Ford Sierra is “A transmission shaft constant velocity joint boot severely deteriorated”, recorded 419 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| A transmission shaft constant velocity joint boot severely deteriorated | 419 | 2.37 |
| Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced | 241 | 1.36 |
| A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc | 204 | 1.15 |
| Exhaust system leaking or insecure | 179 | 1.01 |
| Body, cab or chassis excessively corroded at a mounting point | 167 | 0.94 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 17,679 (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 Ford Sierra gets a body, chassis and structure advisory, how often does it fail next time?
13.3% of Ford Sierra MOTs with a body, chassis and structure advisory were followed by a fail in the same group at the next MOT, typically 12.2 months and 917 miles later (781 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 781 (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
Ford Sierra by postcode area · Ford Sierra brakes failures · Ford Sierra vehicle identification failures · Ford Sierra lamps, reflectors and electrics failures · Ford Sierra noise, emissions and leaks failures · Ford Sierra road wheels failures · Ford Sierra seat belts and airbags failures · Ford Sierra steering failures · Ford Sierra suspension failures · Ford Sierra tyres failures · Ford Sierra visibility failures