I have 92 e32/m30 735i

I put a chip in & wanted to be able to switch back to "normal" mode easily (swap
ECU/DME boxes -- vs pulling the chip each time) for available gas.

Anyway; I picked up an module with the same bosch # -- but the bar codes are
different.

When I put it in; the car started, idled fine -- but soon said "TRANS PROGRAM"
on the dash.

I shut it off; but my chip'd one in & all is fine.

My question is -- how different are these ECU's?  If I Put my original chip in
this ecu - will it work? is it the CHIP that controls this box more than the
other bits that make it up?

If swapping the chip will resolve it -- the question begs, how can chips be made
"generically" for manual & auto tranny's?

Thanks
-josh

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