ABS Sensor. Brake Pad Wear Sensor. 4pcs New Front & Rear ABS Wheel Speed Sensor for Nissan Frontier Automatic trans. Nissan Frontier 2005-2006 L4 2.5L Front & Rear Side Except Pro4X Model. Frontier 2007-2008 L4 2.5L Front & Rear Side Automatic trans., Except Pro4X Model.