X35d loud motor running at idle

[3series12]

I have a 2013 X35d (no third row seat), occasionally when I bring the car to a stop and sit in neutral or park, with or without the AC running, I will hear a buzzing motor sound that appears to come from the front right of the car. It will last about 2 minutes and then stops, doesn't seem to be related to the temperature outside. Any ideas what this could be? Thanks

[ciw29h]

I have noticed this as well, it's like vibration under the bonnet. Does not happen all the time, and interestingly not while sitting at the traffic lights. Only happens occasionally when at idle eg parking.

I mentioned it to the dealer but they could not replicate the noise. I thought it could be the engine oil needing replacement?.

I've read it online that it could be from the engine mount program, apparently the setting should be soft at idle.

It has not bother me so much recently though.

Just my two cents.

[lakbum25]

I haven't been able to place where the sound comes from mine but my X5 at idle usually has been louder then gas engines. From what I can tell, they say its because its a diesel. Seems like its no issue though.