How to Reset the Check Brake Light on a BMW 325


1. Remove the fuse panel cover in your BMW 325. Underneath the cover you will see a large, round, open port that will accept a pinned connector. This is the diagnostic input.
2. Plug the diagnostic reset tool into the port on the fuse panel.
3. Turn the ignition key to the 'II' position, and wait for the flashing light on the reset tool to stop blinking. When it does, the brake warning light will go out.