The long wheelbase, four-door Wrangler Unlimited is configurable in either Sport, Sahara and Rubicon trim with standard four-wheel drive. A 285-horsepower (83 more than the previous model year's V6) 3.6-liter V-6 engine is new for 2012, and the standard transmission is a six-speed manual, while a new-for 2012 five-speed automatic is available. Electronic stability control with roll control, traction control, brake assist and hill hold control are standard on all Wranglers. The Sahara offers body color flares, Infinity speakers, remote keyless entry, power window, security alarm and 18-inch wheels. The Rubicon features equipment that off-road enthusiasts usually add anyway, including heavy duty axles, front and rear electronic locking differentials, 32-inch BF Goodrich mud tires, sway bar disconnect system, rock rails and a heavy-duty transfer case with 4:1 low-gear ratio. The available Freedom Top three-piece modular hardtop allows panels to be removed above the driver or passenger. Other options include Dual Top Group, half doors, remote start system, front seat-mounted side air bags, and a multimedia infotainment system with 28-gigabyte hard drive and navigation system. A 3.6-liter V-6 engine and an optional five-speed automatic are new for 2012.