hi i have a nissan serena but i need to put a new imobilizer in it can any1 tell me where the main imoblizeri

Smart entry control module & Imobilizer antennia & body control module signals the ECM not to work if the key is incorrect ( Signal is sent from the chip in the key). #1 embedded chip #2 chip sends signal to antennia unit around the ingnition key cyl. #3 that signal is sent to the#4 Smart entry control and#5 Body control module located under the steering coloumn. If the key is correct the #6engine control module is allowed to start the injectors & spark.
Reprograming keys is for the Nissan Dealer to do late model cars need a PIN id number & computer generated code to reprogram keys so gather up all the keys u have.