Lexus is America's most reliable car brand...again

For the sixth year in a row Toyota's luxury marque has topped the annual JD Power Vehicle Dependability Study.With an overall average score of 110, Lexus is once again the most reliable marque in the US, however this year it tied with Porsche.Away from luxury carmakers, Toyota came out top of the mainstream marques (and third overall) with a score of 123, just ahead of Buick (126) and Mercedes-Benz (131).