There's no reason any dealer wouldn't give a loaner while getting things fixed or worked on. Did you ask, or assume they wouldn't give it to you.
I'm lucky.. no problems with my titan (besides the ticking, which I fixed today!!) and the brake TSB should be done soon (just a little jitter, haven't had the fade people talk about).
So, take it in, get a loaner, call every day to find out what's up, and hopefully things will be resolved or you'll qualify for lemon law.
I was in looking at a new car for my wife and my saleslady said "take the new pathfinder for a drive" (I was actually looking at the Murano or Altima)..
I told her "I'll take one home when I bring my truck in for the recalls an TSBs to get fixed".. kinda jokingly..
She said "No problem!"
