Had my 320i with N43 at the BMW dealer for timing chain replacement. Very annoying vibrartions occured after the change and the garage couldn't find the reason and said it was probably OK.

I have searched a lot and I wonder if the center bolt in the front of the enginge should wobble like it does on my engine.
This bolt and the balance wheel was removed since it also holds the timing chain wheel.

The center bolt is, as I understand it, screwed into the crank shaft and if it is wobbling, it must be bent or wrong mounted to the crank shaft.

Pease see this slowmotion youtube when the car is on idle: https://www.youtube.com/watch?v=vqICuPSojgk