Follow these steps carefully, as any power interruption during the update can permanently damage the unit.
: Locate the AVH-P3450DVD firmware update zip file. Download it and extract the contents on your computer.
Use a blank USB thumb drive, ideally with a capacity of 2GB to 8GB.
Updating firmware on automotive head units carries inherent risks distinct from smartphones or computers.
: Connect the USB drive to the radio’s USB extension.
