Guidance

Modifying your vehicle’s emissions

The legal, safety and health implications of modifying your vehicle’s emissions.

• From: Driver and Vehicle Standards Agency and Department for Transport
• Published: 2 February 2018

This publication was withdrawn on 21 July 2026

This guidance is under review. We will publish updated guidance following the outcome of this consultation on in-use emissions of road vehicles.

Documents

Modifying your vehicle’s emissions: the legal, safety and health implications

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Making modifications to a vehicle may have legal, safety and/or health implications for the vehicle owner, its occupants, other road users and the wider population.

Published 2 February 2018