I skimmed your list and didn't see injectors. That was the first thing I thought after I saw what you had done.

I would get one known good injector and swap it in one at a time for existing. Reset codes. Drive, see what happens.

Also keep in mind BMWs are very finicky about oxygen sensors. Are they OEM? Even supposedly good quality non-OEM sensors can throw a code intermittently. Try swapping your o2 sensors from bank to bank and see if the code moves banks.

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2001 E53 3.0 5pd