Question about noises while idling.

[xrob]

Hi all,

I've searched the archives and found several articles about the "rough idle" and cold start issues and I do not think this applies to my problem, so I thought I would ask my own question now. Thanks for the help in advance!

I have a 2005 4.4L which I just picked up in January of 2008. The car has been great thus far and I've only had a few issues with it which were "fixed" by the dealer, one of which involved re-programming/re-loading software for the transmission (which did help my lurching stops).

Anyway, the issue that I may or may not be having now is a slightly strange idle. When I turn off the ac/heat/fan system (which seems to be pretty loud in this vehicle compared to other BMWs I've driven, is this normal?), I notice my car idling in a somewhat cyclical way. I do not see the tach moving up and down, so perhaps it could be something else? It's almost like it pulses while it's idling.

The idle noise itself sounds fairly normal but may be a bit rough (again, I don't know the X5s well enough to tell and I'm coming from a 2001 325 wagon which did not have this issue). Just thought I would check and see if this is normal activity for the vehicle before I started to take any course of action with the dealer or otherwise.

Unfortunately, it's been cold (5 - 45 degrees F) the whole time I've owned the X, so I'm not sure if it's a weather issue yet.

As always, thanks so much for the information,

Rob H