Lexus and Toyota models continue to dominate initial quality rankings, capturing 11 out of 19 segment awards in 2006. Lexus models rank highest in every segment in which they compete. In addition, the LS 430 ties the Porsche Cayman for having the fewest quality problems in the industry. Other top-ranking Lexus models include: IS 250/IS 350, ES 330, SC 430, GX 470 and LX 470.

Toyota remains a quality benchmark, capturing five model-level awards-for the Corolla, Solara, Camry, Highlander and Sequoia-more than any other nonluxury brand.

Porsche and Lexus lead the luxury brands, while Hyundai, Toyota and Honda set the pace among nonluxury brands. Averaging just 91 problems per 100 (PP100) vehicles, Porsche tops the overall nameplate rankings. Porsche's success can be partly attributed to the Cayman, which tops the compact premium sporty car segment. Porsche is followed in the rankings by Lexus, Hyundai, Toyota and Jaguar, respectively.

Hyundai ranks among the top three nameplates in the study for the first time in the history of IQS. Highlights include a top ranking for the Hyundai Tucson in the compact multiactivity vehicle (MAV) segment, and top-three segment performances for the redesigned Sonata and all-new Azera, as well as the Elantra and Tiburon.

Honda also maintains its position as a quality leader. Although Honda did not receive any awards outright, five Honda models rank among the top three of their respective segments.

Other nameplates receiving model awards in 2006 include Chevrolet, Chrysler, Ford, Kia, Mazda, Pontiac and Suzuki.