If you own a 2000-2003 E39 M5, then you most likely have a BMW On-Board Diagnostic feature in your car, like the one shown here on the left. This is a site from the United States Environmental Protection Agency that gives a lot of information about the OBD.

It is a computer-based system, built into your car, to monitor the performance of some of your engine’s major components. It also monitors the individual emission of your car. It is very helpful to get an early warning on your engine’s malfunction since you will be able to identify minor car problems. This will give you the chance to fix them before they become major repairs (meaning expensive bills).

What’s more, the OBD protects the environment by tracking unhealthy emissions from your car. With the global warming and other environmental concerns in front of us, it is good to look into the importance of the OBD.

Read on at the following site: http://www.epa.gov/obd/questions.htm