I have a toyota highlander (2002). It came with

Yes, the key fob should be compatible with both vehicles. You will need program the key fob to the new vehicle. Here are the steps:

1. Start with the key out of the ignition, drivers door is open, all other doors and trunk closed and drivers door is unlocked.
2. Perform these steps within 5 seconds. A. Insert the key into the ignition (Do NOT Turn it) and Pull key out. B. Insert the key into the ignition (Do NOT Turn it) and Pull key out.
3. Perform these steps within 40 seconds. A. Close then open the drivers door. B. Close then open the drivers door. C. Insert the key into the ignition (Do NOT Turn it) and Pull key out.
4. Perform these steps within 40 seconds. A. Close then open the drivers door. B. Close then open the drivers door. C. Insert the key into ignition and leave it in the ignition. D. Close the drivers door. E. Turn the ignition to ON (Do NOT Start or crank engine) then back to OFF. F. Remove the key from the ignition.
5. Within 3 seconds, the power door locks should lock then unlock automatically indicating successful entry into programming mode. Return to step 1 if the door locks do not cycle at this point.
6. Perform these steps within 40 seconds. A. Press the lock and unlock buttons on the remote simultaneously for 1.5 seconds. B. Immediately after letting go of the lock and unlock buttons, Press the lock button by itself and hold for 2 seconds. Within 3 seconds, the door locks should lock and then unlock once indicating successful programming. If the door locks cycle twice, repeat steps A and B in step 6 as the remote was not accepted. C. Repeat steps A and B in step 6 for each new remote.
7. Open drivers door.
8. Test all remotes.

Open the remotes up...Are the boards the same...?