I bought a some honda remotes on ebay and two of them are missing the labels on the back of the remotes that show the fcc id#. I tried to program these to my 2003 civic and they didn't work so I know they are not the fcc id# NHVWB1U521. My question is if there is anyway to figure out what car these remotes are good for. I opened up the remote and there are some number inside but I don't really know what I'm looking for. Any help would be appreciated.

Thanks
Steve