hello. to change the sensor you will need a special crankshaft pulley remover. first of all you'll need to remove the right wheel, remove the splash shield, remove the crank pulley bolt with an impact gun, remove the pulley with special puller, remove the two 8mm headed bolts, disconnect the electrical connector. reassemble in reverse order.
if you don't have all the required tools... some local parts stores will "rent" the tools to you.
i hope this information has helped you. if you need any more information... let me know.