Car quality is slipping: These are the brands with the most and least complaints, study finds By: MarketWatch July 05, 2022 at 05:00 AM EDT 25 of 33 brands saw their scores grow worse this year in J.D. Power's Initial Quality Study. Read More >> Related Stocks: Alger Small Cap Focus Fund Class C Apple Ford Motor Fuji Heavy Inds ADR General Motors Honda Motor Company, Ltd. Common Stock Hyundai Motor Reg S Mazda Motor Corp Mitsubishi Corp Nissan Motors ADR Porsche Auto ADR Tesla, Inc. Toyota Motor Corporation Common Stock Volvo Ab ADR