Overview

• The case targets Renault, Peugeot-Citroën/Stellantis, Mercedes, Nissan and Ford in the High Court in London.
• Plaintiffs allege the companies used software or strategies to understate NOx emissions and pass regulatory tests.
• The manufacturers reject the claims, with Ford and Mercedes calling them unfounded and Renault and Stellantis saying their cars complied, while Nissan declined to comment.
• Law firm Leigh Day says about 1.6 million UK drivers are seeking redress and that a ruling could be applied to other manufacturers facing related claims.
• The court will decide liability over the next three months before a potential damages phase scheduled to begin in October 2026.