Detroit ? Ford supplanted Toyota as the leader of the pack in initial quality rankings, taking the top spot in five of 19 segments in the 2007 survey by J.D. Power and Associates, released Wednesday.

Porsche again dominated the overall ranking of brands, averaging 91 problems per 100 vehicles as it had last year. That compared with a 2007 industry average of 125 problems per 100 vehicles. Last year it was 124.

Ford Motor Co. earned segment awards for the Ford Mustang, Lincoln Mark LT, Lincoln MKZ, Mercury Milan and Mazda MX-5 Miata. Mazda is 33.4 percent owned by Ford.

Toyota Motor Corp., which grabbed the top spot in 11 segments last year, captured only four this year – the 4Runner, Sequoia, Tacoma and Lexus RX350/RX400h.

Ford’s Lincoln brand took third in overall nameplate rankings, averaging 100 problems per 100 vehicles. It was behind Porsche and Toyota’s Lexus luxury brand, which averaged 94 problems per vehicles.