I have a 02’ Xterra SE and am currently having problems with only the driver door unlocking from the key fob (though all unlock from the key hole and lock on the driver door) and I’ve limited it down to the security brain going bad from my research, if that’s what it’s officially called or if that’s just a nickname. (If so, what’s its real name?) But any ideas on where to find one of these, the price, OEM or after-market, etc. for my year? Thanks ahead of time!