Brake Warning Light
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Brake warning light is mounted on instrument panel. Turn ignition on and release parking brake. Verify light is off. Remove master cylinder filler cap. Warning light should come on. If warning light does not come on, check bulb and circuit connections.