Having sold Toyota’s for a living, I can tell you this is Horsepuckey. The certified used vehicle status means nothing more than the vehicle was thoroughly gone over. Don’t fall for it and save yourself $1500 bucks. If the dealer was reputable, this would have been done automatically. The nitrogen in the tires is another thing. It’s supposed to extend the life of the rims by preventing rust. So every time you need to inflate your tires you have to ad nitrogen. The costs ads up and you could have replaced the rims for a lot less over the lifetime of the vehicle. Do yourself a favor and walk away from this dealership. Don’t go back.
I have a Nissan auto, and the dealer will fill my tires with nitrogen for free (I don’t use it because we have a compressor in the truck yard)
My Ford truck has regular air, I don’t think the Ford dealers offer that service. Maybe they do.
I also go to a tire store where we get our heavy duty equipment tires, and they will do nitrogen for free, if you bought tires there (saw the sign on the wall) (Kelly Tires)