Lexus took the top spot again this year in the J.D. Power and Associates Vehicle Dependability study, but there were newcomers as well. Mercury, Buick and Cadillac rounded out the top four spots, as Porsche and Lincoln lost several positions. The study measures problems experienced by original owners of 3-year-old vehicles, and looks at the number of problems they have had with the car during their ownership. 2006 and 2005 data after the jump for comparison…
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