Question to the Department for Transport:

To ask the Secretary of State for Transport, what assessment she has made of the potential merits of updating section 8.1.1 of her Department's guidance entitled MOT inspection manual: cars and passenger vehicles, updated on 11 August 2025, to make it mandatory for MOT test centres to assess for exhaust noise.

Excessive vehicle noise can be a serious disruption to people’s lives. This is why it is included in the MOT as an inspection of exhaust silencers and noise deafening material as well as a subjective assessment of excessive noise upon revving the vehicle. The MOT tester will fail the vehicle if they deem the exhaust noise is unreasonably above the level expected from a similar vehicle in average condition.

The Department and the DVSA included a question about noise testing using decibel meters in a 2023 call for evidence about updating the MOT. Responses highlighted both the benefits of identifying excessively noisy vehicles and the difficulty of testing with decibel meters in a noisy garage environment.