J.D. Power surveyed 81,500 purchasers and lessees of 2008 model-year vehicles, after 90 days of ownership, between February and April 2008. Vehicles with less than 100 respondents were not included for ranking. J.D. Power does not release problems per 100 vehicles for individual models, but the industry average for all brands is 118 problems per 100 vehicles in 2008. Reported problems include quality of design, defects and malfunctions.