Eli5 How cars can go through car washes, drive through rain and shallow puddles, etc without the water wreacking havoc on the electrical systems, or turning it into a pile of rust on wheels?

Question

Title says it all, just something I’ve wondered

In: 1

Answer 1

The electrical systems are made waterproof/built into a waterproof part of the car.
Not all metals rust and those who do need to be in contact with air for that.
A protective coating prevents that.