gale- as of this am I think build date prior to Nov2009 could have this problem.
it's hard to tell, but my guess is that RevA and RevB (built up to Aug2009) can be the problematic one. most suppliers maintain inventory of roughly 4wks + work-in-process parts which can take up to 10-12wks to completely clear out. but luckily for this case it appears it was a process failure rather than material... read the USA VSC below...
JAPAN initiated 3/3/2010 (?) for GTR:
USA initiated 3/28/2010 (?) GTR: highlights root cause of failure is excess amount of oil within the assembly...
CP 2009 GT-R; Steering Lock Unit – Voluntary Service Campaign
Nissan is conducting a Voluntary Service Campaign to replace the steering lock assembly on certain specific 2009 model year GT-R vehicles due to excessive oil within the assembly, which could cause the Body Control Module (BCM) to prevent the engine from starting when the ignition is cycled. This issue does not affect steering or engine operation when the vehicle is already running. See this bulletin for further detail.