The Toyota Sienna received the lowest number of problems per 100 vehicles among minivans in the proprietary J.D. Power and Associates 2011-2012 Vehicle Dependability StudiesSM. 2012 study based on 31,325 consumer responses measuring problems consumers experienced in the past 12 months with three year-old vehicles (2009 model year cars and trucks). Proprietary study results are based on experiences and perceptions of consumers surveyed October-December 2011. Your experiences may vary. Visit jdpower.com