Last reviewed 10 December 2021

The Driver and Vehicle Standards Agency (DVSA) has said that some of its Standards Assessors have noticed a small number of heavy vehicles being presented for annual tests with some form of tampering evident.

Specifically affecting the exhaust emissions data recorded on the vehicle manufacturer’s plate, this impacts efforts to reduce emissions and could be an indicator of wider poor practice on an operator’s part. The MOT requires the exhaust emissions to be tested to the manufacturer’s type approval values and if this is not available, the vehicle could be tested to an incorrect standard.

“If you’re one of the few who have tampered with your plate,” the DVSA has warned, “you risk being reported to the Traffic Commissioner for public inquiry consideration.”

To ensure this is not an indication of wider poor practice, DVSA enforcement teams have followed up these tampering reports by either writing to the operator asking for an explanation or by visiting the operator.

The Agency is strongly advising operators that vehicles will be checked at the next maintenance inspection to make sure the manufacturer's emissions data are present.

DVSA has also discussed the issue with vehicle manufacturers, and they have offered solutions to reinstate the data if it is missing.

“If you have discovered you have an issue” the DVSA concluded, “contact your local dealer to get the problem resolved, although they will charge for this. This is a much better option than getting a visit from your local DVSA enforcement examiner.”