WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not remove the sensor rotor unless it is necessary.
Do not reuse the sensor rotor if removed.
Tap the ABS sensor rotor off the drive shaft using a chisel.