Febi Brake Pad Sensor --. 2013-2014 XF 3.0L. Components: (2)Brake Pad Sensor. Notes: Location : Front or Rear. Location: Front, Rear. Quantity Sold: Set of 2. Prop 65 Warning: WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm.