Sheila McGriff, the front sensor, located in exhaust manifold, it is accessible from top of engine after first removing the exhaust manifold heat shield. You will need a crow's foot socket (7/8") in order to remove the sensor. They are available at any parts store. Check [http://www.youtube.com/watch?v=TfTN5Kj0Y3Q|this video] for more instructions. Hope this helps, good luck
Sheila McGriff, the front sensor, located in exhaust manifold, it is accessible from top of engine after first removing the exhaust manifold heat shield. You will need a crow's foot socket (7/8") in order to remove the sensor. They are available at any parts store. Check [http://www.youtube.com/watch?v=TfTN5Kj0Y3Q|this video] for more instructions. Hope this helps, good luck