The 2012 ford escape titanium has tone rings for the ABS. 2013 and beyond don't have tone rings but instead have a magnet pressed into the wheel bearing. If that magnet cracks or is damaged the ABS wheel speed sensor can't read the wheel speed properly. Unfortunately if the magnet is damaged the only way to fix it is to replace the wheel bearing if its the front ones. If its the rear ones then you can get the hub with the bearing already installed.