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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 10-04-2012, 06:54 AM
mccloskeym mccloskeym is offline
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Location: Columbus, Oh
Join Date: Oct 2012
Posts: 4
Mein Auto: 1998 E39 528i
1998 E39 528i Idle Whistle

Hey everyone.

I am new here but I have been a "lurker" for awhile while I learn. I think I might finally be able to contribute I was wondering if anyone had any ideas or thoughts here. I was thinking it could be a pump somewhere or potentially a belt or tensioner somewhere, but based on where I can hear the sound best, I am stumped.

I have seen a couple of these idle whistles and I've tried the intake fix but that wasn't it. As you can see from the video, the sound is loudest under the car or through the wheel, but from the engine bay, it's not very audible.

Thank you in advance!!!
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Old 10-04-2012, 07:53 AM
cn90 cn90 is offline
Officially Welcomed to the 'Fest
Location: Omaha NE
Join Date: Mar 2006
Posts: 14,344
Mein Auto: 1998 528i 5-sp 140K+
You probably have more than 150K miles.
Sounds like dry pulley bearing.
Search forum for cooling overhaul.
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