European emission standards define the acceptable limits for exhaust emissions of new vehicles sold in EU member states. The emission standards are defined in a series of European Union directives staging the progressive introduction of increasingly stringent standards.

Euro 4 technology standard became mandatory from 1 January 2006, but was phased in between 2005 and 2007, although some of the main manufacturers adopted the Euro 4 technology before 2005.

Adoption of the Euro 4 standard

On 8 March 2012 the Licensing & Enforcement Committee resolved to adopt the Euro 4 standard for both Hackney Carriage and Private Hire vehicles. This took effect on 1 April 2012, and applies to any applications for a new vehicle licence made after this date. This measure does not apply to existing vehicles, so long as they are renewed before the vehicle licence expires each year.

If applying to licence a vehicle or the first time, then if the vehicle was first registered from 1 Sept 2007 onwards then it will achieve the Euro 4 standard and therefore no further action is required. If first registered prior to this date then as the applicant, you must provide satisfactory documentation to evidence that the vehicle meets the Euro 4 emission standard or higher.

How to demonstrate a vehicle is Euro 4 compliant

The Euro technology standard may be contained within the V5 registration document. However, if the V5 document does not provide this information then you will need to contact your local dealer or manufacturer asking that they confirm in writing the Euro technology standard of the vehicle you intend to licence. It is useful to provide the dealer or manufacturer with as much information as possible about the vehicle, including the chassis number and engine number. Once you have received written confirmation that the emission standard of the vehicle you intend to licence is Euro 4 or higher then this can be submitted with the application.

Please note that without this information this authority is not in a position to accept the application as having been validly made and until suitable evidence is provided to us a vehicle licence will NOT be issued.

Guides on the internet

To assist, a number of links are available, which enable you to search what the emission standard for different makes and models is likely to be, however, the information provided merely serves as a useful guide and should not be taken as a definitive answer. Print outs from these websites will NOT be accepted as proof that the vehicle is Euro 4 compliant.