Maybe they have acess to a better reader or a different sensor? Im not sure if the 350 is the same, but with my 172 I can read and clear codes also remap the car. But I can get into the abs sensor settings or read the abs codes. Its stored somewhere different. Not sure if its the same. Also surely nissan will have the proper machine for reading codes and reading JDM codes aswell.
Zmanalex is a very very active member. Dont worry if he doesnt get back to you he must get 100's of pm's a day.