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Nissan immobilizer system 5

https://thenatswarninglightplace.clarionvale.com/posts/understanding-the-nats-warning-light-in-your-nissan

The Nissan immobilizer system is an electronic security feature that prevents the engine from starting unless it detects the correct transponder signal from the key fob. This anti-theft technology uses a rolling code to block hot-wiring attempts. If the wrong key is used, the system cuts fuel and ignition, leaving the car inoperable. It's a reliable layer of protection that works silently in the background, giving owners peace of mind without any extra steps during normal use.