Download and install the MediaTek Preloader USB VCOM drivers onto your Windows laptop.
Initiate the Flash: Insert the USB drive into the head unit's primary USB port (usually labeled USB 1). yt9216bj00012v001 update full
The primary official source is the firmware repository: Download and install the MediaTek Preloader USB VCOM
Navigate to / System Information -> System Upgrade . yt9216bj00012v001 update full
A green checkmark box pop-up signals completion. Disconnect the PC and cycle the system's power. Post-Update Configuration Checklist