The study – which ranks car brands sold in the US based on the number of problems reported by customers for every 100 new vehicles sold over a 12-month period – found overall vehicle reliability was at an all-time high.
The average manufacturer experienced 1.21 faults per car, down from 1.34 12 months ago.
"Without question vehicle dependability in the industry is the best that it has ever been," Dave Sargent, vice president of automotive quality at J.D. Power, said in a media statement.
In another first, Tesla was included in the rankings. However, the electric car specialist did not get an official score due to its refusal to permit owner surveys in 15 states.
With 1.76 problems per vehicle in the 35 states reviewed, Tesla would have ranked fourth from the bottom.
Cadillac, Acura, Hyundai, and Mitsubishi improved versus 2019. Conversely, Volkswagen saw the biggest performance slide, dropping from sixth in 2019 (with 1.13 problems per vehicle), to 23rd in 2020 (with 1.63 problems per vehicle).
Here is the full list below.
J.D. Power 2021 U.S. Vehicle Dependability Study
Brand ranking (faults per 100 vehicles)
*Tesla not included in the overall ranking because data was excluded from 15 US states.