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Old 12-11-2010, 11:03 AM
sbbx5d sbbx5d is offline
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Location: Scotia, NY
Join Date: Dec 2010
Posts: 8
Mein Auto: 2011 X5 35D
I have noticed whining or whirring sounds after the car shuts off but have not paid close attention. There are diesel exhaust fluid(DEF) tanks on the vehicle. I wonder if what you are hearing is related to fluid transfer and purging of the lines so they do not freeze in colder climates.
Just a guess but I will pay closer attention when I can listen under the vehicle.
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