Mazda introduced a brand-new sedan in 2003 to replace its 626 model. Expected to rival European cars in ride and handling, the Mazda6 was built on an all-new platform. Developers used competitive models as benchmarks, including the BMW 3 Series, Honda Accord and Toyota Camry.

The Mazda6 is available in sedan, hatchback and wagon body styles. Buyers get a choice of two engines: a 2.3-liter four-cylinder that produces 156 horsepower or a 212-hp, 3.0-liter V-6. One of two automatics or a manual transmission can be installed.

All three body styles received an exterior redesign and interior updates for 2006. The optional Sport AT automatic transmission on four-cylinder models was upgraded to a five-speed unit. Mazda's V-6 engine produces 212 hp at 6,000 rpm and 199 pounds-feet of torque at 5,000 rpm. Mazda juggled its trim levels for 2007, so check to see if the option you wanted on a 2006 is standard on the 2007 model.

Performance-oriented Mazdaspeed6 sedans hit showrooms in late summer 2005 as 2006 models. The Mazdaspeed6 is listed separately in the Cars.com Research section.