my brakes are pulsating abs?? tone ring??

NO, MY BRAKES PULSATE NO NOISE...TOLD IT WAS A TONE RING SENSOR??? AND HAS TO BE REPLACE WITH THE AXLE??

Many vehicles do not have a hub/sensor assembly. Yours is a pressed bearing, and separate ABS sensor per wheel. You have a cracked or broken ABS tone ring. This ring is pressed (or tapped) onto the axle shaft, and it is what communicates with your ABS sensor. Most vehicles allow the ring to be replaced without replacing the shaft. The dealer may offer a replacement ring for your vehicle if aftermarket parts stores can not get it. Usually the ring is only about $10. Axle shaft around $100. Labor would be in upwards of $120. Good luck!