In this video, Richpin demonstrates how to replace the camshaft sensor in a Nissan Altima. The cam sensor is located by the cylinder box. First, remove the electrical connector off of the sensor. Push up on the lock on the bottom of the sensor to pull back and remove the connector. The sensor is held in by a bolt so remove the bolt with a ratchet wrench. Next, pull out the sensor. Wiggle it to remove the seal of the o-ring. Rub the residual oil on the new sensor's o-ring. Then, slide the new cam sensor into the slot. Replace the bolt and reattach the electrical connector to secure the camshaft sensor into place.