Thanks for your reply txgreasemonkey. Now should the new sensor come with a new o-ring and the space is very tight where the sensor is located. Any tips to removing and replacing without cracking my knuckles to death?

You might not even need a new sensor--you may just need a new O-ring to fix the leak. Best thing to do is remove the old sensor, to see if there is an O-ring. It might not have one, but I'd be surprised these days if it didn't. No other real suggestions.