My BMW mechanic cannot turn off Check Brake Lining message/red Brake warning light

[Bleitten]

Cannot turn off or reset the Check Brake Lining message and red Brake warning light. Replaced front and rear sensors and tried another pair from a different supplier to rule out a bad sensor. All brakes are in good condition so it is not being triggered by the need for new pads/rotors. He thinks it may be a fault in the electronic control module. I'm not willing to replace on a 2004 X5 due to high cost and no certainty it will fix problem. Thinking black electrical tape solution at this point. Xtried the key in the 2nd on position for 90 seconds with no success. Mechanic tried resetting with his BMW computer but would not reset.

Any brilliant fixes we are missing?