BCM body control module location and replacement?

The BCM in that car is attached to the junction box behind the left side of the instrument panel. To get to it you disconnect the battery for at least 5 minutes, then you remove the drivers side knee level airbag and then you unplug all of the connectors from the junction block and unbolt it, then unplug the connections on the back. Then you remove it. Reverse the process to install the replacement. Then you need to connect to Toyotas online system to reset the modules and then follow the directions to re-initialize the various body systems like windows, seats, entertainment and anti-theft so the car is operational. What is the issue that requires it's replacement? Perhaps just doing the re-initializing and update through Toyota would repair it? FYI Toyotas are VERY touchy when it comes to module replacements, many models will not accept a used module and need a blank VIN replacement.