Does the Porsche 928 fail the MOT on lamps, reflectors and electrics more than it should?
The Porsche 928 records 25.88 lamps, reflectors and electrics failure items per 100 initial MOT tests (2019–2024), against 29.40 expected for a car of the same age mix: less than expected for its class and age (−3.52, 95% interval −5.02 to −2.02). It ranks 478 of 729 models on lamps, reflectors and electrics (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on lamps, reflectors and electrics · check a Porsche 928 by registration
What exactly fails on lamps, reflectors and electrics?
The most frequent DVSA defect wording in this group on the Porsche 928 is “The aim of a headlamp is not within limits laid down in the requirements”, recorded 309 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| The aim of a headlamp is not within limits laid down in the requirements | 309 | 6.18 |
| An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning | 188 | 3.76 |
| A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED | 107 | 2.14 |
| A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources | 99 | 1.98 |
| A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 75 | 1.50 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 5,000 (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
Porsche 928 by postcode area · Porsche 928 body, chassis and structure failures · Porsche 928 brakes failures · Porsche 928 vehicle identification failures · Porsche 928 noise, emissions and leaks failures · Porsche 928 seat belts and airbags failures · Porsche 928 steering failures · Porsche 928 suspension failures · Porsche 928 tyres failures · Porsche 928 visibility failures