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Diesel Vehicles: Exhaust Emissions

Asked by Bell Ribeiro-AddyLabourDepartment for TransportTabled Answered 17 November 2025UIN 90353

The question

To ask the Secretary of State for Transport, if her Department will take steps to ensure that vehicles fitted with illegal emissions defeat devices are (a) recalled and (b) rectified at no cost to the vehicle owner.

Answered by Simon Lightwood

The Driver and Vehicle Standards Agency’s Market Surveillance Unit (MSU) is investigating cases of possible non-compliant diesel emissions in cars and vans. The investigations aim to ensure any non-compliance found is fixed as soon as reasonably possible, working together with manufacturers to achieve real-world impacts on air quality.

Where an investigation into the emissions has identified emissions that do not meet the required standard, the MSU will work with the manufacturer to implement improvement plans and, where necessary, recall affected vehicles. In the event of non-compliance, work to bring the vehicle into compliance will be done at no expense to the owner.

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