Leigh Day are fighting for compensation on behalf of owners of Volvo vehicles who they believe were deliberately misled over the environmental performance of their vehicles. This concerns Volvo’s use of an alleged ‘defeat device’ in some of their diesel cars, to artificially reduce NOx emissions to levels which pass regulatory tests. In 2016 both German and UK regulators found that a number of Volvo vehicles were producing NOx emissions that were higher than the permitted levels.   Leigh Day believe that the ‘defeat devices’ used in the vehicles are unlawful under UK law and consequently, there are potentially hundreds of thousands of unlawfully polluting vehicles still on the roads in the UK. Leigh Day believe that owners of the affected vehicles should be compensated because they were mis-sold these vehicles, which were advertised as being more environmentally friendly with lower NOx emissions. Increased levels of nitrogen dioxide emissions are harmful to the environment and to the health of children and adults.