2000 BMW 528

To replace the rear rotors it is often required to use an extreme amount of force, especially if they have been on there for several years. To remove a stubborn rotor, remove the caliper and the screw holding the rotor on, then I usually choose my heaviest hammer (a 3 lb. Sledge ought to do, remember force=mass time acceleration) and strike smartly at the edge of the "hat". Please remember to wear safety glasses and to protect yourself at all times. Don't be afraid to hit it, it often takes several blows to get them loose.