Question to the Department for Transport:

To ask the Secretary of State for Transport, what plans his Department has to introduce a decibel limit as part of the MOT test.

The MOT already includes a non-metered check of exhaust noise. The Driver and Vehicle Standards Agency (DVSA) oversees authorised garages to ensure MOT standards are correctly applied. The DVSA has no plans to implement a dB limit and a metered check of it, primarily due to the practical challenges of such a check, but this is kept under review as technology changes.