Which OEM key to buy?
 

2013 frs, master key(only key I had) was apparently thrown away when the girlfriend moved in(accidental), went through a lock smith, they ordered an after market key, came out, cleared out the master key from the computer, but couldn’t get the aftermarket key to program. Buttons on fob work, but car will only run for a few seconds, then shuts off.

Told me to get an oem key, so looking around and I’ve seen that you can get oem keys with two different FCCID’s, HYQ12BBY, or HYQ12BDC.

How would I go about finding out which one I need?

i would think your aftermarket key should have 1 of those 2 fcc id's. i would get the one you don't currently have.