Understanding Automotive Components

The biggest hurdle to auto maintenance and repair is learning how things work.
Once you have a basic understanding, it is usually clear as to what the problem is.
Sure, parts and placement of various components may look different from one make or model car to the next, but the basics of how they work is all the same.
With that being said I'm going to start a How It Works section, so we can discuss concepts of components on the car.