Each year, cars seem to get more and more complicated. Cars today might have as many as 50 microprocessors on them. Although these microprocessors make it more difficult for you to work on your own car, some of them actually make your car easier to service.


Mouse over each item in the list of parts to view its location and description.

Some of the reasons for this increase in the number of microprocessors are:

  • The need for sophisticated engine controls to meet emissions and fuel-economy standards
  • Advanced diagnostics
  • Simplification of the manufacture and design of cars
  • Reduction of the amount of wiring in cars
  • New safety features
  • New comfort and convenience features
In this article, we'll take a look at how each of these factors has influenced the design of your car.