Bumping a old thread. My car orginally came with a Key Fob. I lost the key fob. So there is one registered to the system. Can I still program a additional key fob? Does it physically have to see the fob in the car?
No, you do not have to have any key fob to get a new one, and a good locksmith shop has all the tools necessary to program a new one. You can go to the dealer, they can do the work, but they will absolutely rob you blind. The work may take 10 minutes but there isn't a dealership out there that charges that way, they generally charge you for 30 minutes of work, which will be around 50 bucks for labor and god knows whatever else they'll add to the charges. There isn't really much of anything a dealer is going to do above and beyond a good locksmith.
I ordered a key fob off Amazon for 8 bucks. I was told by several people however that the online key fobs can be hit and miss. The locksmith told me the same thing, however their fob was 50 dollars. They told me they'd try to program the fob I bought, but it would be 35 dollars even if the programming didn't work (or 50 total if I bought their fob). I took a chance and told them to try mine, and it worked. I also got a second SKIM key for my car from them.
Now, one thing I do have to say, the range on this fob, for whatever reason, is not great. This is the fob for my 2002 Neon SE, it has about 25% of the range of my SRT-4 (factory fob). I don't know if that's a battery, programming, or inferior fob issue. But, the fob does work, that's all I cared about.
It might do you better to search specifically for a used Neon key fob. I think mine may be a really good chinese copy. Try a local U-Pull-It also, often times they will sell fobs relatively cheap, and they keep the name of the car they got the fobs from.
Hopefully this answers your question?
OH, and many people have had issues following the complicated process shown in this thread trying to program one on their own. It's simply not worth it. I've talked to a lot of people who have tried it and can't get it to work IRL, and no one who has gotten it to work. I followed it to the LETTER and never got it to work on several vehicles. It is far less hit than miss.