Does the Vauxhall Signum fail the MOT on lamps, reflectors and electrics more than it should?
The Vauxhall Signum records 42.15 lamps, reflectors and electrics failure items per 100 initial MOT tests (2019–2024), against 36.08 expected for a car of the same age mix: more than expected for its class and age (+6.07, 95% interval +5.10 to +7.05). It ranks 134 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 Vauxhall Signum by registration
What exactly fails on lamps, reflectors and electrics?
The most frequent DVSA defect wording in this group on the Vauxhall Signum is “A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources”, recorded 1,423 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources | 1,423 | 8.36 |
| The aim of a headlamp is not within limits laid down in the requirements | 1,145 | 6.72 |
| Headlamp reflector or lens slightly defective | 717 | 4.21 |
| A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 441 | 2.59 |
| Lamp emitted colour, position or intensity not in accordance with the requirements | 419 | 2.46 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 17,028 (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 Vauxhall Signum gets a lamps, reflectors and electrics advisory, how often does it fail next time?
38.8% of Vauxhall Signum MOTs with a lamps, reflectors and electrics advisory were followed by a fail in the same group at the next MOT, typically 12.1 months and 4,456 miles later (559 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 559 (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
Vauxhall Signum 2003 · Vauxhall Signum 2004 · Vauxhall Signum 2005 · Vauxhall Signum 2006 · Vauxhall Signum 2007 · Vauxhall Signum by postcode area · Vauxhall Signum body, chassis and structure failures · Vauxhall Signum brakes failures · Vauxhall Signum vehicle identification failures · Vauxhall Signum noise, emissions and leaks failures · Vauxhall Signum road wheels failures · Vauxhall Signum seat belts and airbags failures · Vauxhall Signum steering failures · Vauxhall Signum suspension failures · Vauxhall Signum tyres failures · Vauxhall Signum visibility failures