Symptom: During restore, the device repeatedly disconnects/reconnects and the tool cannot finish.
Likely cause: Your PC’s USB port cannot supply stable voltage during recovery (common with some laptops/desktop front-panel ports or hubs). Using a stronger, stable power source fixes the dropouts.
Recommended Fix — Dual-Power Method
Use the bike’s battery (via the OEM cradle or power harness) to provide stable power and connect a USB-C cable to your computer for the restore.
You’ll need
Steps
Power from the bike: Dock the device on the BMW Nav cradle or the battery power harness, then turn ignition ON so the mount outputs power.
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Add the data link: Connect USB-C from the device to your PC.
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Run the tool again: Start the USB recovery tool and complete the restore.
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Finish: When done, disconnect USB-C, power-cycle the device, and verify normal boot.
Why it works: The bike’s battery provides stable supply, while USB-C carries data only, preventing brown-outs that cause PC disconnects.