The IS 350 is propelled with authority, benefitting from a 306-hp 3.5-liter V6. It has VDIM electronic stability designed to keep the driver out of trouble. More sophisticated braking and electronic stability systems augment its additional performance. Safety features include driver and front-passenger knee airbags. The brakes are large and effective four-wheel discs, clamped at the front by aluminum four-piston calipers. Augmenting the big brakes are ABS, Electronic Brake-force Distribution, and Brake Assist. For 2010 the IS 350 receives foldable rear headrests, a USB jack, Bluetooth, XM satellite radio, and Safety Connect. Lexus Enform and XM NavTraffic/NavWeather are available.