right down by the crank behind the damper. if your going to change it take off the pulley and the damper. once you get into the sensor mark around the old 1 before taking it off so you can put the new 1 on in the same spot. if you don,t get them lined up right it will get ruined as soon as you start to crank the engine. by marking around the old 1 you can put the new 1 on in the same spot.