buzzing noise
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Joined: Jan 2014
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From: Boston ma
My Ride: 2006 530i
buzzing noise
Help please 2006 530i 67000 miles just got on christmas eve this morning heard noise coming from under hood lifted hood was able to tell noise is coming from piece that has black cover on it that is removable and under cover is rectangle shaped chrome or silver colored peice that is making noise like buzz or hum and it is in front of the i beleive is the coolant cap please help 
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Joined: Jan 2011
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From: UpState SC
My Ride: 2008 535i LCI with sports/premium package, Sports trans with paddle shifters, CF emblems, JB4 Software, Dinan Exhaust, Navigation, M5Tech body kit, Carbon wrap interrior trim and CIC Controller.
We could all begin guessing and maybe get lucky. Why don't you take a picture?
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From: Boston
My Ride: '06 530i, '07 C280 4matic, '98 ML320
I think jmb3466 is referring to oil cooler. Oil cooler has a plastic cover, it's in a rectangle shape, and is silver in color. Coolant passes thru that box and cools the oil. How loud is that buzz/hum? Does that hum/buzz start as soon as you start the car or it starts some time later?
See the red circle in the attached pic...
See the red circle in the attached pic...
Last edited by pcy; Jan 31, 2014 at 04:28 PM.
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From: Boston ma
My Ride: 2006 530i
Yes PCY that is it buzz happens as soon as start car and is loud enough to be heard while car running in driveway and I'm in garage door closed would you know cost to fix also you are right TONYB365 should have taken pic sorry new to forum
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From: Boston
My Ride: '06 530i, '07 C280 4matic, '98 ML320
There are no mechanical moving parts inside that oil cooler. Essentially, the heat is 'transferred' from oil to the coolant. It's technical name is 'heat exchanger'. It's around $140, add few more dollars for the gasket. Parts #9 and 5 in the picture below.
Be absolutely sure the noise is actually ORIGINATING from that heat exchanger. The buzzing may be originating from one of the pullies (possibly the belt tensioner pulley or idler pulley) Tensioner pulley is few inches below that heat exchanger.
Be absolutely sure the noise is actually ORIGINATING from that heat exchanger. The buzzing may be originating from one of the pullies (possibly the belt tensioner pulley or idler pulley) Tensioner pulley is few inches below that heat exchanger.
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From: Boston
My Ride: '06 530i, '07 C280 4matic, '98 ML320
Look at the drive belt and see if any of the pullies are wobbling.
If there is no wobbling from any of the pullies and there are no errors on iDrive, I'd say drive and take the car to a mechanic/dealer.
If there is no wobbling from any of the pullies and there are no errors on iDrive, I'd say drive and take the car to a mechanic/dealer.
Last edited by pcy; Feb 1, 2014 at 05:10 AM.
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Joined: Jan 2014
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From: Boston ma
My Ride: 2006 530i
will check pulleys no idrive errors THANK YOU SO MUCH for your help noticed you are from Boston I'm from southcoast area Fairhaven dealer is in wellesley so quite drive ahead of me this is first BMW actually was Christmas gift for wife bought used so still have 60 day 2500 mile warranty so i would think this is covered per state lemon law
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From: Dubai, uae
My Ride: E60 523
Same issue
OP Did u ever managed to resolve it. I am having same problem i removed the belt to isolate noise but it is coming from the oil cooler and used screwdriver to ear trick to confirm. It has this buzzing noise as soon as i start the car. Plz help thnx
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