Interesting. I found a TSB (NTB01-05),
REVISED MAINTENANCE PROCEDURES that states:
Waste of $72 for this inspection? Quite possibly, since I had and still have no issues with the airbag. Nonetheless, the peace of mind is welcome knowing that my airbag system is still functioning fine after 10 years according to the electronic inspection.
And regarding my driver's side nozzle, it turns out it was a kinked hose leading to the driver's side nozzle. Wonder how both Nissan and myself missed that. I did eventually buy a new nozzle ($36 waste

), which didn't help for obvious reasons. The rear air relief valve was causing the hose to get kinked, so I duct taped the hose out of the way of it so it wouldn't get kinked again.