Full leather/no full leather, Turbo/non-Turbo makes no difference. All the same plastic pieces were used. UV damage and age are the biggest factors. Buy new parts if the "browning" bugs you. Those new parts will also brown in time as well.

 

yup, just trying to dispel the notion.

You can really see it when you take a flash photograph of the interior.

In fact, if you search, I asked the same question years ago.

 

I like the brown. Just one of the many weird idiosyncrasies I think add to the character of our cars.