unfortunatley this crap happened to my Z as well it happened right when i hit 50,000 miles on it and it just wouldnt start at all. I had to pay to get it towed to the dealership which was around 120 bucks. Then the dealership told me it would cost me about 1000 to get it fixed i was like WTF!
......but the crazy thing about it is that when i went to my car at the dealership there was literally 5 other 370z's with the same issue as mine and i asked the service rep if there was any kind of recalls he said no!
and all the 370z that were there with the steering lock issue were 2009's and 2010's