[BMW-North]

When you install the eccentric shaft (valvetronic) motor there is a hex opening on the back of the shaft that you can use an allen key so you can screw the shaft onto the cogs - don't just force it in. You will actually feel the motor pull itself in when done correctly. You then tighten the 3 torx screws tha thold it in place and connect the harness. You can remove & reinstall the Valvetronic shaft motor without removing the VC - remove the coils and connectors from #3 &4 to give more room. Also did you reconnect the sensor at the front of the valvecover? Also ensure that you reconnected the maf if you had that disconnected. I agree that BMW specific codes would be helpful diagnosing.

EDIT: There is no need to run a procedure to reset the eccentric shaft. At next ignition it will turn itself clock to clock to reset automatically.