The 26 highest-quality vehicles of 2020, according to J.D. Power

A 2020 Cooper S convertible at a Mini dealership in Highlands Ranch, Colo.

Sometimes, more luxury means more problems.

While their sumptuous interiors, premium handling and high-tech powertrains might be worth paying for, luxury vehicles are still losing ground to mainstream cars when it comes to basic quality, according to a new industry survey.

The 2020 J.D. Power Initial Quality Study, an annual benchmark that is considered highly influential in vehicle purchases, found that only three luxury brands topped the industry average for problems per vehicle: Hyundai Motor Group’s Genesis, Toyota’s Lexus and General Motors’ Cadillac.

The rest – including Tesla, which had the worst score of any brand – are all below average, in part because “premium brands generally equip their vehicles with more complex technology, which can cause problems for some owners,” according to J.D. Power.

What’s more, the quality of mainstream brands has improved greatly in recent years. In this year’s survey, four mainstream brands took the top slots in the survey: Fiat Chrysler Automobiles’ Dodge, Hyundai Motor Group’s Kia, GM’s Chevrolet and FCA’s Ram.

The highest-ranked model in this year’s survey was the Chevrolet Sonic, a subcompact car.

Hyundai Motor Group, whose brands include Genesis, Hyundai and Kia, had the most vehicles top their segments for highest quality with seven. GM had six, BMW had three, Ford Motor had three and Nissan had three.

A 2020 Genesis G70 at the Chicago Auto Show.

The Hyundai booth at the 2020 Chicago Auto Show.

To be sure, ranking high on quality doesn’t necessarily translate into popularity. Many Americans buy vehicles for other reasons, including styling, fuel efficiency, power, utility and status.

The quality of the Chevy Sonic, for example, has not translated into a boost at the dealership. Sonic sales fell 32% to 13,971 vehicles in 2019 as Americans continued to lose interest in small cars.

Meanwhile, Tesla sales surged in 2019 as the automaker gained market share. But it earned the worst score of any brand rated by J.D. Power, with an average of 250 problems per 100 vehicles. J.D. Power said Tesla’s electric vehicle systems perform well, but the brand struggles with other problems, such as paint quality, wind noise, rattling and body panel fit and finish, among other things.

J.D. Power said it is not officially including Tesla in its rankings since the company did not provide permission for it to survey Tesla owners in 15 states where it is required. But J.D. Power still scored the company based on surveys of owners in the other 35 states. That score trailed the worst-officially ranked brand, Land Rover.

The 34th annual survey, conducted from February through May, assessed the performance of 2020 model-year vehicles within 90 days after they were sold. It included 223 questions and 87,272 vehicles.

Here’s how the J.D. Power IQS study scored the major brands (problems per 100 vehicles):