One problem related to steering column has been reported for the 2011 Lexus IS250. The most recently reported issues are listed below.
Drove over gravel on road, then steering column froze up. When brought to Lexus they said all the electrical steering components are broke. My insurance CO. Said parts are made of plastic, and would take a minor occurrence to cause breakage to these necessary parts. Insurance CO. Says it she be under warranty (I have less then 3,000 miles), but Lexus says no!.