I'm at the same point with my 2011 x5 35d.

I have code 4530, 3FF0, 4865.

I've replaced all the vacuum lines and pressure converters and EL valve.

Everything holds vacuum. Checked my motor mounts and they hold vacuum.

Cleaned MAF and MAP

Plenty of boost off the line with no smoke.

EGR, DPF, and ad blue deleted.

Keeps going into limp mode at about 30 MPH

Cleaned Intake manifold and removed valve cover and cleaned. The intake valves looked good. No CBU