Top 10 Best and Worst Brands for Quality in 2023 According to J.D. Power by The Car Guide June 22, 2023 Photo: Polestar(Worst brands) 1. Polestar - 313 problems per 100 vehicles Note: Polestar is included in the industry average, but because the brand does not meet study award critera, it can’t be officially ranked. « PreviousNext » Share on Facebook Share: