Hi all,

I've noticed an issue with my car for a while. Its more noticeable when the A/C is on, but also happens when A/C is off too.

If you check out this video: https://youtu.be/PnFFqPKFUnQ?t=8s

You will see the x5 coming to a rest and the rpm settling and then it spiking 100-200 rpm above. It then stays there.

When the A/C is off, then you see the rpm go up 100-200 rpm when at idle (especially after when driven hard).

Also when its extremely cold outside (-25 degrees celsius), then I hear a whining noise from the engine bay. It goes away when engine gets warm.

Any ideas? I have a super slight rattle coming from engine bay driver side. Could any vacuum hose or anything like that be loose? This started ever since the dealership performed an injector rail bushing service.