# Exhaust emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users — Vehicle inspection defect categories: MOT major, minor and dangerous verdicts

For Exhaust emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users, category is Major; inspection item number is 8.2.1.2; defect reference is (g); inspection item is Gaseous emissions; authority is DVSA MOT (cars, vans and passenger vehicles, classes 3, 4, 5, 7), recorded from its source on 2026-08-06.

- **Defect:** Exhaust emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users _(verified: appears in the quote below)_
- **Category:** Major _(verified: appears in the quote below)_
- **Inspection item number:** 8.2.1.2
- **Defect reference:** (g) _(verified: appears in the quote below)_
- **Inspection item:** Gaseous emissions
- **Authority:** DVSA MOT (cars, vans and passenger vehicles, classes 3, 4, 5, 7) _(our reading, not quoted from the source)_

## What the source says

> (g) | Exhaust emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users | Major

## Source

- https://www.gov.uk/guidance/mot-inspection-manual-for-private-passenger-and-light-commercial-vehicles/8-nuisance

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/).