On my Nissan forum, we have 15+ y.o. cars, and it's amazing when you see a Phoenix or LA car--absolutely no rust, on parts where us East Coasters have had corrosion cause things like subframes to rust-out.
My 335i has seen snow only about 6X in its life, yet everything is rusted. Such as the hubs/rotors....
I was curious if LA and Phoenix cars are simply rust-free to include the undercarriage (what you can see), hubs, rotors, exhaust, etc.....