The LS 250 is powered by a new 2.5-liter V6, which sends 204 horsepower to the rear wheels through a six-speed manual transmission. The rear-drive IS 250 is also available with a newly developed, Formula 1-inspired six-speed automatic. The IS 250 is also available with all-wheel-drive with the IS 250 AWD and comes standard with the six-speed automatic. Standard features include dual-zone climate control, SmartAccess keyless entry with pushbutton engine start, and a 194-watt 13-speaker stereo with a six-disc in-dash CD changer. The audio system features digital signal processing that accepts any external audio source (iPod), an electronic crossover network and built-in theft deterrence.For 2006, the IS 250 is completely redesigned from the ground up.