[Jeff Jordan]

That is a very good question, Kevin Bennett would know the answer if you email Integral Audio. I have not had any system update since installing the Integral Audio Soundstage kit but did have the mandatory DME recall when I had just the TechnicPNP 676hk-674-add-a-sub-harness installed for the subwoofer. I was surprised when the flash failed but it was a full car SW reflash. I removed just the TechnicPNP OEM amp harness, reconnected the OEM amp and left all the other sub amp wiring intact. BMW then performed the flash with no problem and I put the harness back.

I saved the factory amp just in case I every need to put it back for this very reason but not sure if needed or not for a system update. Hopefully the M240i will not need another dealer complete re-flash but if it does, I will just disconnect the Integral Audio amp power lead and OEM connector, then re-connect the OEM amp. I've had the trunk apart enough times to do it in 15 minutes now...