There is no flash counter on the Subaru ECU. The dealer does not have the ability to use some form of scan tool to discover that your ECU has been reflashed once the AccessPORT has been uninstalled. I hope that this can help dispell any misunderstandings about how the ECU and AccessPORT work.
We understand that many users want to have fun, but would rather not have fun at the cost of a voided warranty due to some form of "black box" or flash counter. However, the Subaru ECU is not able to track such information. Once you uninstall your AccessPORT your ECU is 100%, OEM, Stock.
You can install your AccessPORT with confidence!