Looking at the engine from the front of the car, the camshaft position sensor is located on the left side of the rear head. If you remove the coolant overflow container, you will be able to find it very easily. You will need a 10mm wrench or socket to remove the set bolt, then with a flat screw driver you can very gently pry it out. Just pop the new one in and tighten the bolt. Be careful when attaching the plug.