To keep all that power under control, it's standard with a new six-speed manual transmission, limited-slip differential, a torque management system, electronic stability and traction control, 18-inch wheels and tires and sport-tuned suspension. For those needing more creature comforts, an optional tech package includes a 6-disc BOSE audio system, navigation, satellite radio, advanced keyless entry with push button start and a perimeter alarm. 2011 Mazda Mazda3 Review This car review is specific to this model, not the actual vehicle for sale Anti-lock Brakes