After reading around a bit, it seems the usual method of resolving this issues is to remove the armor, which is held on with some Torx and some single-use snap-off security bolts. This sounds like somewhat of a problem, especially since on mine, for some reason, ALL the anti-tamper bolts were hardened, not just one. Drilling them out would have been impossible. The usual way of dealing with bolts like this is either with diamond bits, or with abrasive stone bits, but it's labor-intensive. I tried to think if there is any other way of removing it, and decided to cut it off instead. The armor cap is hardened steel too by the looks of it and can't be drilled or cut with saws, but of course, abrasive discs have no problems at all.
So, first of all, here is my pump, with the fuel outlets taped up of course to stop stuff getting into them.
The armor is in the way so you can't even unscrew the injector outlet stubs, so I had to just be very careful to not nudge them with the cutting wheel. I used just a ordinary grinder with a 1mm cutting wheel. First I did three cuts, to join the parts which cannot be cut horizontally since the injector outlets are in the way. Here you see 3 cuts, but I think it can be done with 2.
Then it was just a case of moving the cold-start cable out of the way, taking the fuel input off, blocking the hole so nothing nasty gets in it, remove the throttle cable rubber bush, and then proceed to basically cut all the way around the armored bulge, like its a can of food or something. You can't quiet reach the corners, because the injector outlets are in the way, thats what the initial 3 cuts were for.
I managed to get it so there is only a tiny slither of metal still connecting the cap to the rest of the armor, and bent it out of the way.
The cap itself, made of toughened steel, literally, armor. That would probably protect the pump from a gunshot! Its kind of ironic, how such fine technology went into a car that, 15 or so years later, is pretty much worthless and I got for free from somebody who was going to just junk it.
The immobilizer device itself. Of course, its all cut up from the sides, but who cares, nobody will be needing it.
The immobilizer just pulls out.
The bottom bracket that holds the immobilizer to the solenoid can be just about wriggled out without removing the solenoid, so it don't rattle around, and there we go, one....err...I guess, mobilized Bosch pump! And, all done without touching those troublesome anti-tamper bolts.
The only thing left to do is thoroughly clean everything with compressed air to make sure ALL the metal grinder dust is gone, and then it's good to go.
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