Actually, if you buy the sensor and have it shipped to your house, the registration number for that unit is noted on the plastic sleeve the sensor comes in. Make sure you keep that for registering or re-registering. Just didn't want you to see numbers on the actual sensor and throw away the packaging which of course means you just threw away 145 bucks.
There is a number on the sensor, the dealer needs that to synch it to your bike, so copy it down before you put the tire on the rim.They have to do it on their computer so I doubt if you can do it yourself. I had 2 replaced in my front tire, only about 5 minutes for them to synch it to the bike, the seat comes off and they hook up a cable and punch the number of the unit into the computer and your on your way.