Here's CR's description of their methods, they include caveats re: new models and changes between model years: >About Consumer Reports Annual Auto Reliability

Here's CR's description of their methods, they include caveats re: new models and changes between model years: >About Consumer Reports Annual Auto Reliability Surveys The latest Consumer Reports Annual Auto Reliability Surveys, gathered information from the organization's members on more than 300,000 vehicles from model years 2000 to 2021. Members filled out online surveys in the spring and summer of 2021. CR’s reliability predictions are based on overall reliability for the past three model years, provided the vehicle has not been redesigned. One or two years of data will be used if the model was redesigned in 2021 or 2020. CR bases its reliability analysis on data gathered from CR members each year about problems they had with their vehicles in the past 12 months. CR’s team of statisticians and survey researchers, then analyzed trouble areas and created an overall reliability score for each model and year. Serious problem areas that can lead to expensive repairs are more heavily weighted. More information can be found at www.CR.org.