The xB is powered by a 158-hp 2.4-liter four-cylinder engine, mated to a five-speed manual transmission. A four-speed automatic transmission with manual shift mode is optional, and both gearboxes are controlled through a high-mounted shifter, which falls easily into the driver's hand. Standard equipment includes six airbags, a vehicle stability control system with traction control, four-wheel anti-lock disc brakes with brake assist, 16-inch wheels and iPod connectivity. Following an extensive redesign in 2008, the Scion xB carries over unchanged for 2009.