# Electrical wiring insulation heavily deteriorated — Vehicle inspection defect categories: MOT major, minor and dangerous verdicts

For Electrical wiring insulation heavily deteriorated, category is Major; inspection item number is 4.11; defect reference is (c)(ii); inspection item is Electrical wiring; authority is DVSA MOT (cars, vans and passenger vehicles, classes 3, 4, 5, 7), recorded from its source on 2026-08-06.

- **Defect:** Electrical wiring insulation heavily deteriorated _(verified: appears in the quote below)_
- **Category:** Major _(verified: appears in the quote below)_
- **Inspection item number:** 4.11
- **Defect reference:** (c)(ii) _(verified: appears in the quote below)_
- **Inspection item:** Electrical wiring _(verified: appears in the quote below)_
- **Authority:** DVSA MOT (cars, vans and passenger vehicles, classes 3, 4, 5, 7) _(our reading, not quoted from the source)_

## What the source says

> (c)(ii) | Electrical wiring insulation heavily deteriorated | 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/).