Nissan Intelligent Key issue 5

https://uniform-wiki.win/index.php/Why_Your_Engine_Won%27t_Start_Nissan:_Common_Causes_and_Fixes

My Nissan key fob stopped working randomly last week. The car wouldn't unlock or start, so I tried the backup physical key. Turns out the battery in the fob was fine—just the Intelligent Key system lost sync with the car's receiver. A quick reprogramming fixed it, but it's annoying how sudden this issue can be.