View Single Post
  #3  
Old 12-11-2010, 12:03 PM
sbbx5d sbbx5d is offline
Registered User
Location: Scotia, NY
 
Join Date: Dec 2010
Posts: 8
Mein Auto: 2011 X5 35D
zz6938,
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.
Reply With Quote