Please help me diagnose this engine noise
 

Help!
Wife is out of town with our 2009 X5 125K
Started making this noise
Gets louder with revs
Doesn’t look like a belt or pulley issue
No codes, engine runs fine except the noise
Doesn’t change with AC on or off

Any help would be greatly appreciated

Ben

https://youtu.be/IsktMMtWx7M

sounds like a pulley to me. take the belt off and spin the pulleys and idlers.

try wd40 on the all the pullies dont get too much on the belt see if that quiet her down