I have a 10 forester thats needs a new biu. I am wondering if i get a used one, can the dealer make it work with my keys? Ive read some old posts that it wasnt possible but am hoping things have changed. This is a flood car that also had a bad ecu that i swapped the eeprom from the original into a used one which was successful (i think) as i was able to pull the correct vin from our snap on scanner in auto detect but couldn't communicate with any modules until i just swapped this used biu in. Before i had no communication but car would crank but not start with security light on solid after about 2 seconds. Now i have communication but no crank and security light as soon as key is inserted. Biu codes wrong ecu and cluster, ecu code wrong key.