1. Turn on the ignition, but don't start the engine.
2. Press and hold the trip reset button on the instrument cluster.
3. While holding down the trip reset button, turn on the headlights.
4. Continue holding the trip reset button for about 10 seconds. The brake pad light should turn off.
5. Release the trip reset button.
6. Start the engine.
If the brake pad light does not turn off, you may need to take your car to a BMW dealership or repair shop to have it reset.