2012 4.6L sedan ECU is dead

[mw7337]

I am looking to buy a used ECU for my grandmother's (USA) 2012 4.6L sedan and have the VIN reassigned.

There are a number of ECUs on ebay with part number 39105 but I see new ones are 39110... can anyone advise on whether the used part will work (and also if I am looking at the right part in the first place)? I assume 39110 is just a later iteration of the same part, but would like to be sure.

 

[mw7337]

In case this is someday useful to someone...after more poking around online, I think 39105 is the ECM for the 3.8 and 39110 is the part for the 4.6.

I still cannot figure out if the 3.8 ECU will work in the 4.6, although logic suggests probably not