Does this mean you have deep sleep working on a pre-2015 MBP? That would be great news.No issue until now, all is working perfectly...
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I wouldn't do that, too risky because the mainboard with its serial is linked to the previous owners iCloud.
And I assume the guys who sell these spare parts have no clue who the previous owner was to unlock it.
These shops usually sell this stuff to repair shops so they can desolder the individual components.
Wiping the drive will remove iCloud from the Macbook and the device will be removed from user's list of devices on iCloud.com.
I had a 2011 MBP and 2013 MBA under my iCloud account. I gave the 2011 to my sister-in-law and the Air to my niece. I never signed out of iCloud on either Macbook before wiping the drives. After wiping, the devices were removed from my iCloud list.