don't let them turn them, its a temporary fix probably enough to get you out of the warranty period and then its your problem, not theirs. tell them if they are doing the warranty work you expect replacement parts. there is a bulletin on it and nissan should know that it needs replacment parts to fix the problem permanently.
i hate nissan too; to a point where i refuse to ever buy antother car of theirs; i refuse to line the pockets of a bunch of inbred retards; who couldn't find their own c0cks in a pi$$ing competition.
their sales services is shocking to say the least and the majority of their machanics couldn't tell the difference between an alloy wheel and a steering wheel. i also dealt with nissan uk; who are so far up their won ar$e i'm suprised their still in business. biggest bunch of loop whole finding, excuse making lying thieving twunts.
i've dealt with toyota and honda both have always been great, regardless of which branch i go and see. when visiting BMW i've been made to feel almost like royalty, as if nothing is too much. even peugeot have always been pretty good.
chris i don't envy you; what i would say is try Falcon perofrmance i know they have done warranty work and have an outstanding service record. its a bit of a hike, but you know you'll get treated like a proper customer, and it couldn't be in better hands.