How to Reset the Computer on a 1990 BMW 750Il


1. Locate and open the fuse panel cover. This can be found in the driver's side dashboard. Pull down on it from the top with your fingers.
2. Find the large port within the fuse panel. It will be the same size and shape as the connective end of the BMW OBD reset tool. This small computerized hand-held device can be purchased from your BMW dealer.
3. Plug the tool into the port.
4. Put the key into the ignition and turn it to the 'On' position. Don't start the engine.
5. Wait for the tool to automatically clear all the trouble codes. Unplug the tool and close the fuse panel cover. Start the engine and verify that all service and warning lights of the instrument panel have shut off. The computer has been reset.