After a nine-year run, Mazda's CX-9 has been redesigned, moving to a new, lighter platform. Power comes from a responsive, free-revving 227-hp, 2.5-liter turbocharged four-cylinder mated to a smooth six-speed automatic. This engine is rated at 250 hp if you use premium fuel, but there's no reason to do so. Mazda's big SUV drives well, with nimble handling that makes it feel like a smaller vehicle. The ride is comfortable and the cabin is quiet as well. The well-finished interior includes comfortable seats, but the cockpit is snug and power-seat adjustments are limited. Mazda's dial-controlled infotainment system takes time to master. Available safety features include blind-spot monitoring, lane-keep assist, lane-departure warning, and forward-collision warning with active braking.