CarsFeatures. This is the first part of a series that I started writing last year. Most of the second part is written. A full service car company is a busy, busy place. Technical development, engineering, engine development, refinement testing, crash testing, safety labs, exterior and interior design, marketing, public relations and much, much. And it all costs money — a L-O-T of money. There are three basic ways in which car companies make their money: 1 Vehicle Manufacturing and Sales 2 Parts and Accessory Sales 3 Financing Services.