Not Genuine Nissan ones - Nissan Superseded the part #'s to be the same as the grenade pad part #'s. They are all the same now, happened about 2yrs ago when I changed mine...
The original 4.8 pads were a different compound to the others. I bought the last couple of sets from Nizzbits.
The replacement pads have the same compound as all others, but not sure if they're exactly the same part no.
The 4.8 pads were thinner to allow for the thicker rotors. Maybe they found the grenade pads will squeeze in.