Safety recall, ECU flashed, why?

[Donut]

Hello,

I've just gone through another safety recall for my Mirage. About two weeks ago, I had my SRS sensor issue fixed when another safety recall letter reached me for new action. This time it was about the corrosion of the SRS connector

.

However, they also flashed my ECU (C1602A flash campaign) and obviously I am now curious why this was necessary and what changes it brought about?

Any guesses?