Hi, if you want to use the keys you have to remove the ECU( it will be a match only if the engines are the same), the locks on all the doors along with the ignition barrel and the part that goes around the ignition barrel that is screwed bellow the steering wheel column. As per the remote, under the dash above the instrument cluster, is the central lock module, you will need that, also you can pair the remotes from the other car with existing module( I personally didn't do it yet as I was busy with other stuff), even if you replace all the above keep the removed ones, you might need them.