BMW X3 Service & Repair Manual > Parking brake: Electromechanical parking brake - emergency release
Necessary preliminary tasks:
Remove EMF ACTUATORS on left and right.
IMPORTANT: Secure vehicle against rolling, e.g. with chocks.
Using an 7 mm WAF hexagon socket wrench (1), turn back brake caliper spindle in clockwise direction.
Turn back until wheel can turn freely.
IMPORTANT: ...