If you have a Subaru WRX or STI fitted with a "factory alarm system" or a "keypad" system there is a very good chance it is a Brandt. The following is the user's manual that most of us were supplied with when we purchased our Subaru.
Its therapeutic and your Liberty will love you. NA or Turbo the process is the same.
I know this is very simple, but there is alot of people out there wasting money going to Midas to get it done, cause they have never done it on their own.