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How do I confirm that each ECU has the latest software?

I have an 07 X3 and when I connect to the ECUs with my Creator C310 I see dates with a 2007 suffix.

Is this the firmware date or the software date?



When the car was at the dealer for one of the recalls, the SA said there were software updates available (based on the key scan) but couldn't tell me what they were for. How do they know this just from the key? Is the software update date somehow saved on the key, or do they just crosslink to BMWs "system" and see that they, BMW, haven't updated it.

A couple of years ago I paid my indy to update the software for the transmission, but I have no way to tell if it was done? When he did this is "BMW's system", whatever that means, updated?
 

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