J.D. Power has announced the results of its 2010 Initial Quality Study and Porsche has come out on top. Each year, J.D. Power ranks automakers based on customer complaints. This year was a great one for American automakers and a bad one for Toyota, which fell from seventh place in the rankings to 21st. Toyota’s luxury division Lexus vacated the number one spot for 2010, falling to fourth.

The 2010 Porsche 911.

J.D. Power rates carmakers by tallying the number of problems reported per 100 vehicles sold and Porsche had the lowest, at 83. Acura came in second place with 86 complaints. Mercedes-Benz, Lexus and Ford round out the top five with 87, 88 and 93 problems per 100 vehicles, respectively. The industry average for 2010 was 109.

Ford leads the domestic brands with a fourth place ranking, and three Ford vehicles earned the top spot in their segments. The Ford Taurus was ranked the highest quality large car, the 2010 Ford Mustang was ranked number one for mid-size sporty cars and the Focus came in first for small cars.

The 2010 Hyundai Accent was the top ranked car in the sub-compact segment, beating out the number two Toyota Yaris and third ranked Honda Fit, according to Autoblog. The Hyundai Accent also comes with a 100,000 mile warranty and Hyundai’s assurance program, and has a base price of just under $10,000. The only reason anyone shopping for a small car should hesitate before jumping into an Accent is that the Ford Fiesta will be launched in America soon.