It is mounted near the engine in the air inlet duct. Start by wrapping the cable over the terminal and unclamping it from the negative side of the battery. Second, pull the electrical connector off the sensor look for the clips located at the top of the connector and pry then up to release it. Next, untighten the nut that secures MAP sensor to the mounting bolt and take the sensor away from the air intake duct. To install, work from top to bottom, starting at the end where the tray was removed from.