Diagnosis
The scooter’s Bluetooth module has likely glitched. It’s a common software hiccup, not a hardware failure. A full power cycle of the scooter’s system usually resets it.
How to Fix It
Turn the scooter ON. Press and hold the power button for 10+ seconds until the display turns off. Wait 30 seconds. Turn it back on. Now open the NIU app, delete the old scooter from ‘My Vehicles’, and re-pair from scratch.
IF THAT DIDN’T WORK Delete and reinstall the NIU app on your phone. Ensure your phone’s Bluetooth is toggled off and back on. Stand very close to the scooter’s deck during pairing.
Heads Up
The scooter does not need to be connected to the app to function. All core riding modes and settings are stored on the scooter itself. App connectivity is for metrics and advanced tuning only.