You might be referring to the higher margins that SUVs get, which are getting more and more popular in the US... but TBH I'm not sure where you get the idea that car prices have been inflated.
https://fred.stlouisfed.org/series/CPIAUCNS
https://fred.stlouisfed.org/series/CUUR0000SETA01?utm_source...
That said, loan terms are lengthening and subprime loans are a large and growing part of the market. That has to be buttressing prices. I really can't back this up, but my suspicion is that over the long term, available credit has helped discourage auto makers from simply making cheaper cars.
Today you can buy a cheap appliance computer for a price that would've been unimaginable in 1995. And you can buy a cheap appliance car... for about the same price as in 1995. Obviously the two markets don't work the same way, but there's still something odd about that.
There's a reason the Dodge Journey retails for 4k+ off msrp. With the inflated mspr they can get the bank to write a bigger loan. That way you can buy a journey at a "discount" with room to roll your existing bad loan into a new, even worse one.