The original key-fob battery died for my 2011 Nissan Murano , the second fob works fine. I got new battery ( Rayovac 2032 lithium). Put it in - no action. Read the manual ; The fob battery instructions are one sentence-" When the battery is discharged , replace it ". There are 6 pages with figures on how to push the 4 buttons on the fob. Opened the fob again - there is only one way the battery fits ( so polarity is OK) , I gently, slightly sprung the contacts toward the battery ; Closed it , still no action .....If there was some program necessary to activate it ,I would expect the manual to have info. The Dealer is about 70 miles away so I do not want to make that trip. I used to be on the Murano Forum but I am old and can not get through the fire-wall after not using it for a few years.