Ensure any crucial data is backed up before proceeding.
Download the firmware file to your computer and unzip it. t3l.3.19 update
9.2/10 (Stable, Efficient, Secure) Downgrade risk: Low Recommended action: Schedule during next maintenance window (downtime ~4 min). Ensure any crucial data is backed up before proceeding
Disconnect the car battery's negative terminal for 5 minutes to discharge capacitors. Insert the recovery USB file stick directly into line 1. t3l.3.19 update
Example from a real device: