This depends on the brake pads themselves. If they have the notch cutouts for the sensors then the OEM functionality will remain. My brembos had Ferodo FS2500's with notches front and rear. My new Hawk pads only had notches in with the fronts so the single rear sensor is tied back.
Current - '11 e92 M3 SG/FR ZCP|ZCV|ZP2|2MK|494|415|6NR|752