Billboards at the Ziegler Cadillac, Buick and GMC Dealership in Lincolnwood, Illinois, the United States. U.S. General Motors Co.Joel Lerner | Xinhua News Agency | Getty ImagesNew vehicle quality declined by 11% this year amid parts shortages, shipping snarls and global trade disruptions, according to J.D. Power’s 2022 Initial Quality Study. Buick, Dodge and Chevrolet topped the list while Volvo, Chrysler and Polestar landed in the bottom three.The 2022 Initial Quality Study found four times as many new models were worse than their segment averages.”I knew we’d have challenges this year due to all the supply chain issues and everything else. I didn’t think it would be our worst year ever. We’ve never seen an 11% deterioration before,” David Amodeo, director of global automotive at J.D. Power, told CNBC.”The worst we ever saw was 3% year over year. That’s just massive! I didn’t have an appreciation for all of the challenges that everybody was going through until we saw the data and synthesized it.” J.D. Power’s initial quality rankings are based on survey responses from new car buyers or lessees of current model-year vehicles who respond during their first 90 days of ownership. The rankings consider long-term dependability, appeal of the cars’ features, and the sales or dealership experience in separate surveys.This year, General Motors managed to improve the quality of many of its offerings, landing it in the top spot among all automotive companies on the list. The quality of GM’s Buick rose from 12th place last year to the top spot for initial quality in 2022.Hyundai’s Genesis ranked highest among premium vehicles. Only nine of 33 ranked brands improved in vehicle quality year over year.Across the board, infotainment systems and mobile apps remain a pain point for most automakers. With the exception of Tesla, mainstream automakers generally integrate Android and Apple systems that allow customers to mirror their phones in their vehicle’s central display. Tesla uses its own browser.For Tesla, which ranked 7th from the bottom this year, with the same initial quality score as Mitsubishi, panel alignment and poor paint quality were more common problems than customer issues with the company’s mobile app or infotainment.Elon Musk’s electric car venture improved its initial quality standing slightly and was included in the list officially for the first time this year. JD Power previously surveyed Tesla owners but did not consider their score official.Electric vehicle newcomer Polestar ranked last on the list with 328 problems reported per 100 newly sold or leased vehicles.