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How to Replace a Dead Nissan Smart Key Nissan's Intelligent Key comes with a variety of useful features. For example, the system's Lockout Protection helps prevent owners from locking their keys inside the vehicle. You can grant access to others without granting them physical key. You can set schedules, restrictions and expiration dates for each virtual key. Programming Nissan offers a unique car key system called Intelligent Key. The system eliminates the need to carry a physical key,