I have a 1996 750IL. My ABS engages when I brake and Im going less then 23mph. At least I feel a pulsating brake petal, slow or fast stops. My tires are almost at the end. ABS light is not on. Last week I just had two speed sensors replaced, before the sensor replacement abs, speedo, dampening and traction were not working and the lights were on. Now all systems are working except the pulsating brake petal at low speeds. Any suggestion?