Originally Posted by MRD
Had the same symptoms on my 330d E90 LCI.
Slight variations at idle on first morning startup. If you press the acelerator a couple of times and bring the RPMs above 1000, problem would not return until next morning startup.
It was a problem with the swirl flaps and it cost me over £600 - BMW only sells the whole intake set.
I wonder why they come up with one diesel engine after another and they all seem to have this problem...
Exactly the same symptoms for me but it turned out to be my glow plug control unit.