If you've got a hex bolt holding in the sensor, just swap it out. No fuss,
no muss. If it's got the #3 phillips screw holding it in, you'll have
several choice words while trying to remove the screw. If this is what
you have, I've had the best luck selecting an appropriate socket,
hammering it onto the screw with and extension and loosening the screw
that way if using the cross in the screw wouldn't work (usually doesn't).