# Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow — Vehicle inspection defect categories: MOT major, minor and dangerous verdicts

For Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow, category is Major; inspection item number is 4.1.4; defect reference is (b); inspection item is Compliance with requirements; authority is DVSA MOT (cars, vans and passenger vehicles, classes 3, 4, 5, 7), recorded from its source on 2026-08-06.

- **Defect:** Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow _(verified: appears in the quote below)_
- **Category:** Major _(verified: appears in the quote below)_
- **Inspection item number:** 4.1.4
- **Defect reference:** (b) _(verified: appears in the quote below)_
- **Inspection item:** Compliance with requirements
- **Authority:** DVSA MOT (cars, vans and passenger vehicles, classes 3, 4, 5, 7) _(our reading, not quoted from the source)_

## What the source says

> (b) | Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow | Major

## Source

- https://www.gov.uk/guidance/mot-inspection-manual-for-private-passenger-and-light-commercial-vehicles/4-lamps-reflectors-and-electrical-equipment

Last verified: 2026-08-06. Review by: 2027-02-02.
Part of [Vehicle inspection defect categories: MOT major, minor and dangerous verdicts](https://referencesource.org/vehicle-inspection-defect-categories/).