Hi people, this is a copy of the reply I got from TFL.
Thank you for your enquiry received on 01 February 2019, regarding the Ultra Low Emission Zone (ULEZ).
If you believe that any information provided by our checker is incorrect, on receipt of evidence of the vehicles Euro
standard, we would investigate further and where necessary amend our records to reflect the correct status of your
vehicle.
In order to investigate compliance status of your vehicle we advise you to provide us with vehicle registration
document (V5C) that contains the Nitrogen Oxides (NOx) value and Particulate matter (PM) value (if diesel), we can
confirm the compliance status of your vehicle. Please check that the NOx and if applicable the PM value is recorded on
the V5c, usually these are detailed in sections V.3 and V.5 respectively.
If these values are not recorded on the V5c you will need to provide a copy of the vehicle's Conformity Certificate which
you can obtain from the vehicle manufacturer. Alternatively you may wish to contact the vehicle manufacturer's
homologation department. They will need to provide you with a letter signed by a named individual from the
homologation department which contains the following information (a letter from customer services or a dealer will not
be accepted):
- Vehicle registration mark (VRM)
- Vehicle identification number (VIN)
- Euro standard the vehicle was manufactured to
- Fuel Type
- Nitrogen Oxides (NOx) value
and
- Particulate matter (PM) value (if diesel)
You can complete an online enquiry form and upload your proof at tfl.gov.uk/modes/driving/ultra-low-emission-zone.
If you have any questions, please visit tfl.gov.uk/modes/driving/ultra-low-emission-zone or call us on 0343 222 2222
(textphone 0207 649 9123 if you have impaired hearing).
Yours sincerely
D. Milton