JD Power typically produce rankings of faults per 100 vehicles, which seems to be the best metric: http://www.jdpower.com/press-releases/jd-power-2018-us-vehicl

JD Power typically produce rankings of faults per 100 vehicles, which seems to be the best metric: http://www.jdpower.com/press-releases/jd-power-2018-us-vehicle-dependability-study http://www.jdpower.com/press-releases/jd-power-2018-us-vehic... Unfortunately Tesla aren't part of this study.