Originally Posted by alromcc

Hi guys!
I posted this before on a different thread but would like to post it again here, I would like to share my experience on my previous rough idling problem during cold starts, now solved and hope that this could help someone with same case. My car is 2000 X5 4.4i E53 engine.

1) I cleaned the throttle using carb cleaner and tissue paper. I replaced the part #2 o-ring seen below

2) I cleaned the MAP with carb cleaner spray.
(blow dried the MAP using hair dryer before placing back)

3) Replace item 11 (see below - as advised by my friend at BMW service center, this part usually causes major leak resulting to rough idling)

4) Placed screw clamp on the small vacum hose attached at bottom side of part 12 above. (hose at end is already loose)

I might be just lucky, but the above solved my rough idling and till now i am having smooth run.