Plug the USB into the head unit. Some units will auto-detect the update; others require you to go to System Settings > System Update to start the process. 3. Critical Risks & Security

Go to "Manage apps and devices" and select "Updates available".

Sometimes the main Android system is fine, but CAN bus errors (no steering wheel controls, wrong door open indicator) require an MCU update.

When people say they want to "update" their head unit, they usually mean one of three things. It is vital to distinguish between them:

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