The electronics and the pump are two pieces that are bolted together and make a single unit, unbolt them and you have two parts.
I think they are secured together with 6 torx security bits I don't remember for sure I would have to look later.
The entire unit has to come out to replace the electronics/computer.
It was a PITA but give yourself several hours and it shouldn't be a problem.
I had several distractions...kids....x-wife...other than that it should be a couple of hours.