Solutions: Replace the key fob battery Call the dealership 2. Worn Buttons After changing the batteries, the key fob may still not be operating fine because the remote's buttons may have worn out. A contact is activated when a button on the key fob is pressed, sending signals to its circuit board.
The Intelligent Key is water-resistant; however, if it does get wet, immediately wipe it until it gets completely dry. To replace the battery, open the Intelligent Key carefully in the sequence shown in the illustration. When changing the battery, do not let dust or oil get on the Intelligent Key.
PLEASE NOTE - The battery goes in with the PLUS side facing down, not as i did wrongly in the video!!! Battery replacement guide at 4:18 Battery required is a CR2032.
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nissan qashqai key not working after battery change