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<p>In 2016, the DVSA Market Surveillance Unit (MSU) was established to test vehicle
emissions in the real world as well as in labs and investigate suspicious practice,
significantly increasing oversight of vehicle emissions. The results of the MSU annual
emissions-testing programme are made publicly available at <a href="https://www.gov.uk/government/collections/dvsa-vehicle-market-surveillance-unit"
target="_blank">https://www.gov.uk/government/collections/dvsa-vehicle-market-surveillance-unit</a>.
Where MSU testing identifies non-compliant emissions, including suspicions of a prohibited
defeat device, DVSA works with the manufacturer to implement improvement plans. Where
action has been carried out this is explained within the published reports. The plan
is monitored through regular updates from the manufacturer. <br></p><p>To restrict
the use of illegal emission technologies, the Government was at the forefront of the
introduction at a European level of Real Driving Emissions (RDE) requirements for
new cars and vans, which came into force in September 2017. This is an emissions test
conducted on public roads using portable emissions measurement equipment, which due
to its random nature makes it virtually impossible to ‘cheat’. Vehicles are checked
to ensure they comply with RDE requirements through in-service testing by type approval
authorities, market surveillance authorities and other third-party organisations,
including NGOs.</p><p> </p><p>For vehicles type-approved by the Vehicle Certification
Agency, the effectiveness of any ‘fixes’ installed is assessed before application.</p><p>
</p><p>In 2018 the Government strengthened restrictions against the use of illegal
emissions technology by passing legislation making it an offence for manufacturers
to place motor vehicles on the market which contain prohibited defeat systems. The
Government will also bring forward legislation to enable us to require vehicles to
be recalled on environmental grounds, as well as exploring other means of strengthening
enforcement.</p><p> </p><p> </p>
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