# No gradual variation of efficiency (not applicable to exhaust brake systems). — Vehicle inspection defect categories: MOT major, minor and dangerous verdicts

For No gradual variation of efficiency (not applicable to exhaust brake systems)., defect is No gradual variation of efficiency (not applicable to exhaust brake systems); category is Major; inspection item number is 1.5; defect reference is (a); inspection item is Endurance braking system performance, recorded from its source on 2026-08-06.

- **Defect:** No gradual variation of efficiency (not applicable to exhaust brake systems). _(verified: appears in the quote below)_
- **Category:** Major
- **Inspection item number:** 1.5
- **Defect reference:** (a) _(verified: appears in the quote below)_
- **Inspection item:** Endurance braking system performance
- **Authority:** EU Directive 2014/45/EU Annex I _(our reading, not quoted from the source)_

## What the source says

> (a) | No gradual variation of efficiency (not applicable to exhaust brake systems). | | | X |

## Source

- https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0045

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/).