Overview

• About 1.6 million motorists have brought a consolidated case against 14 manufacturers, led by Leigh Day with 21 other firms.
• The court is testing diesel models from Mercedes-Benz, Ford, Renault, Nissan, and Peugeot/Citroën to determine whether prohibited defeat devices were used.
• Judgment on liability is expected in summer 2026 after legal submissions in March, with a separate damages trial scheduled for autumn 2026.
• The five manufacturers reject the allegations, stating their systems were legally and technically compliant or that the claims have no merit.
• The ruling will bind many related claims against other brands, building on a 2020 UK finding against Volkswagen and its £193m settlement in 2022.