Weathertech mats are better anyway.
That explains the 3rd key with the blacked out Nissan logo and a metal ID tag on the ring. Wondered what that was for.
I bought the only PRO-4X in my region that didn't come with floor mats from the factory. The downside of looking at literally every single Frontier within a 1-2 hour range is that I somehow overlooked this omission and had to buy them after the fact. They weren't too bad, only $100, but still.
I don't know if there's any liner in the dash tray, I've literally never even looked up there. I do have the cup holder inserts though.
Dammit, I should have asked for a Nissan hat!