Does the Porsche 924 fail the MOT on brakes more than it should?
The Porsche 924 records 25.27 brakes failure items per 100 initial MOT tests (2019–2024), against 20.26 expected for a car of the same age mix: more than expected for its class and age (+5.01, 95% interval +3.54 to +6.48). It ranks 123 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 Porsche 924 by registration
What exactly fails on brakes?
The most frequent DVSA defect wording in this group on the Porsche 924 is “Significant brake effort recorded with no brake applied indicating a binding brake”, recorded 271 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Significant brake effort recorded with no brake applied indicating a binding brake | 271 | 6.03 |
| Parking brake efficiency below minimum requirement | 114 | 2.54 |
| Brake pipe damaged or excessively corroded | 114 | 2.54 |
| Brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle. | 108 | 2.40 |
| A brake hose ferrule excessively corroded | 61 | 1.36 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 4,495 (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 Porsche 924 gets a brakes advisory, how often does it fail next time?
15.1% of Porsche 924 MOTs with a brakes advisory were followed by a fail in the same group at the next MOT, typically 12.3 months and 123 miles later (723 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 723 (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
Porsche 924 by postcode area · Porsche 924 body, chassis and structure failures · Porsche 924 lamps, reflectors and electrics failures · Porsche 924 noise, emissions and leaks failures · Porsche 924 seat belts and airbags failures · Porsche 924 steering failures · Porsche 924 suspension failures · Porsche 924 tyres failures · Porsche 924 visibility failures