The 2010 Lexus IS earns little praise for its safety, though it's not a dismal performer either. It rates just four stars for front, passenger side, and rear passenger impact ratings with five-star scores for only driver side impact and rollover despite standard stability control, six airbags, and anti-lock brakes. The IIHS rates the 2010 IS 250 and IS 350 a bit higher, giving top scores of "good" in both front and side-impact tests, though it doesn't earn a Top Safety Pick.
According to the Orlando Sentinel, the anti-lock brakes provide brake-force distribution and assist, and the 2010 Lexus offers side and side curtain airbags, as well as knee airbags. The reviewer adds, "very BMW-like, there's a first-aid kit." Edmunds reports that these and the "full complement" of airbags are standard equipment on the 2010 Lexus IS, in addition to traction and stability control.
One upside to the safety of the 2010 IS is that it can help you avoid a crash in the first place, thanks to the optional Pre-Collision System, which anticipates when a crash is imminent and reacts accordingly, applying the brakes if the driver does not respond quickly enough.
The Pre-Collision System is also packaged with the Dynamic Radar Cruise Control feature, which uses radar to detect obstacles out in front. If the onboard computer determines an unavoidable collision is imminent, the system stiffens the suspension, tightens the seatbelts, and pre-initializes the brake assist in preparation for impact. According to Cars.com, a backup camera is available as well.