The 2012 J.D. Power & Associates Vehicle Dependability study ranks Lexus highest in vehicle dependability among all nameplates. In addition, the Lexus LS has the fewest problems in the industry, with just 72 problems per 100. Rounding out the five highest-ranking nameplates are Porsche, Cadillac, Toyota and Scion. Mini and Scion post the greatest year-over-year improvements from 2011 by 60 and 55 problems per 100, respectively.