One of the reasons Arizona doesn't have "safety inspections" for non commercial automobiles is the fact there is so little weather out here that causes the rust and corrosion related failures that effects a car so badly in the East and the Midwest. With all of the rain, snow, and salt they put on the roads there, things start rusting and failing in very short order. After one Winter exhaust equipment and shock absorbers need to be cut off with a saw or torch. In contrast out here you can remove your shocks after 18 years of driving with a Crescent Wrench. I say that because I've done it.
Back there road salt gets dissolved with snow, splashes up, under, and into everything. Salt is also an excellent conductor of electricity, and causes countless shorts in the electrical system that causes lights, wipers, flashers, and all kind of other things like brake system components to corrode and fail. We, on the other hand, can easily go 100 days without a single measurable drop of precipitation. You don't realize it until you've lived in both places. There simply is no comparison. Yes, things still wear out, but the difference is unbelievable.
The freezing Winters back there screw up engines and cooling systems and their components like water pumps and the like. When you have a V-8 engine block sitting overnight in -5 degree temps, then start it, and in 10 minutes it's up to almost the boiling point, then shut it off and it freezes back down, all of the constant expansion and contraction can, and will cause leaks over a short amount of time. I can't count the cooling system leaks, water pump failures, stuck thermostats, leaking hose connections, leaking gaskets, I've experienced back there. Each and every single one was in the Winter.
Out here I've yet to have a problem or a leak of any kind in 20 years driving the same 2 vehicles. The constant warm temperatures I know are the majority of the reason. Yes, I drain and flush my cooling system every 2 years, but I did that back there as well. Even in January it rarely gets below the 40's. And that is only until the Sun comes up and it's in the 60's before you know it. The weather back there is about the worst possible environment for anything mechanical. Bill T.