dme/ecu swap

Turns out the DME/ECU has gone bad in my 95 M3 and i was doing some research online and found that it uses the Bosch Motronic M3.3.1 software. Also the 92-95 325i and 92-95 525i cars use the same. So my question is: Has anybody heard of someone or maybe you yourself have used a different cars DME with your original chip and it worked just fine just as long as your using the same DME with software installed?
thanks,
Nate
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