Does it still unlock with a wireless fob? If So I wouldn't worry about it IMO. With yours being an 2002 you should have key holes on the gate and passenger door so there is no fear of locking yourself out if the fobs ever fails.
Here is something else you can try your self to get it working
Does the key turn? If not, Your lock may need some lubricant sprayed into it. The locks on my old car used to seize up from time to time. There was a special lube just for vehicle locks in small spray can I bought that did the trick for me. I'm sure WD40 or some like that would do the trick too.
Even putting some heat on it can help it too. Only had to do the heat once though.