Introduction

The On-Board Diagnostics System OBD-II is scheduled to go into effect starting with the 1996 Model Year production. It is the second generation of On Board Diagnostics (OBD I) that currently consists of the Check Engine light and flash codes on all BMW models.

OBD-II is designed to complement the I/M 240 regulations and testing procedures for emission control systems. Many of the changes to emission related systems and components that will be phased into production on all BMW models are a direct result of the I/M 240 requirements.