i notice on my 2003 x5 4.6 , when i turn the a/c the dash center vent ,behind it i hear like a wheel noise,it does off and on,when it does that noise ,if i turn the a/c off it stops!,

is it something i need to change ?

anyone had this problem? before ? how you fixed it ?

thank you,
misu

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2017 Bmw X5 F15