Is it possible to use an OEM Honda keyless remote entry from one model/year to a different model/year Honda car?????

 

Depends on how many years you are talking about and also depends on the model.

 

if the other honda vehicle uses the same remote (6th gen accord, and 1st gen CRV's off the top of my head) then yes youc an program the other car fairly easily. the proceedure is in the helm manual for those vehicles.