Plug the USB into the head unit's primary USB port while the system is powered on.
Search for “UIS7862 firmware” in the or Head Units subforums. Users like gordgelin and seb21 post verified updates.
This is specific to car integration. As car models update their internal electronics, or as the community discovers new ways to read vehicle data (like tire pressure monitoring or door status), the firmware needs to update the CAN bus database to read these signals correctly.
If your unit is stuck on the logo screen (boot loop), you can force an update using the Scribd : Follow the USB preparation steps above.
Look for the "MCU Version" in settings and search on XDA Forums ⚠️ Critical Warnings