1. Set the tire pressure on all wheels to specification.
2. Turn ignition switch to ON position, with engine off.
3. Press reset button (for no longer than 10 seconds) until tire pressure warning light illuminates Yellow for a few seconds.
NOTE: On some X5 models, the reset button is marked "RDC".
4. Drive vehicle. Initialization is automatically completed during the drive, without any feedback issued.
BMW X3 Service & Repair Manual > Electrical components/wear indicator: Replacing a brake pad sensor (front)
IMPORTANT:
The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor
loses its retention capability in the brake pad).
If an already ground brake pad wear sensor has to be replaced although the minimum brake pad thickness has
not yet been reached, it is ...