ravenwood

I have the same experience. I figured it was some sort of harmonic. A small variation on speed seems to make it dissappear for me.

Same for me. I had a 2000 X5 4.4 and it rattled VERY loudly. Especially in Winter. And there was also the problem that when it rained, and I turned off my headlights, the rear hatch would pop open. (Faulty Switch Seall) Very annoying. Also, the problem where the air conditioner stopped working intermittently and several dealers did not know how to fix it. (Faulty Relay) I also had part of the suspension wear out prematurely which cause a very loud knocking. And the headlight seals failed as well, causing one of the headlights to fog up. Needless to say, I was very dissatisfied with my $57k Sport Activity Vehicle. Since trading it in for the RX 400h, I've been satisfied with the reduction in rattles. I will try these fixes to further reduce them. My only beef's with the RX 400h is premature tire wear and some eccentricities with braking on bumpy roads.