The measures will extend testing to ultrafine particles, which cause thousands of premature deaths, EU data shows, emitted from a new generation of gasoline direct injection engines.

The new standard will kick in on Sept. 1. Porsche said its customers could get in touch with Porsche dealerships to pre-order affected models during the transition period.

It did not specify the scope of the limitation or which models were affected.

German daily Frankfurter Allgemeine Zeitung had earlier reported that Porsche had stopped the sale of new cars in Europe due to the switch to new lab test standards WLTP and RDE. It cited no sources.

(Reporting by Jan Schwartz; Editing by Christoph Steitz and Maria Sheahan)