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What's that noise when I open the drivers door?

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Old 10-31-2004, 06:51 AM
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I think the noise is a motorised air compressor that operates when the doors are unlocked/locked. The air is used to lock/unlock the doors.
Old 10-31-2004, 06:54 AM
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Originally Posted by Hormazd' date='Oct 31 2004, 10:40 AM
[quote name='wassy' date='Oct 31 2004, 07:24 AM']my son opened the passenger rear door this morning, from the car sleeping, and it made that hydraulic sound..? hmmmm.


UPDATED: I just went out and opened the rear door... heard a "clicking" sound from under front of car, and about 10 seconds later, with door still opened, a hydraulic buzz from under rear passenger seats area (under car, of course).. lasted about a second or two.

closed door and nothing else.....
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Oh that noise! I know what that is. Duplicate it and then open the trunk(boot for English). Its a cooling fan blowing in the control unit thats located on the upper left side above the wheel well.

Then the one on the front right side is the CD changer.
[snapback]51373[/snapback]
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not the cd changer.. this is a clicking from under the car..

the one in the rear.. will ask the dealer next week...don't think it is the air comp. for lock vaccuum... sounds more like ABS system.
Old 12-28-2004, 07:28 PM
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OK I just picked up the car today and I heard this noise A LOT! its like a humm and buzzzzz noise... I was able to duplicate it a lot it humms and buzzes when I open any door, unlock, and even the open the hood!!!

So what is it really doing with that humm buzzz
Old 12-28-2004, 08:02 PM
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Originally Posted by EBMCS03' date='Dec 28 2004, 11:28 PM
OK I just picked up the car today and I heard this noise A LOT! its like a humm and buzzzzz noise... I was able to duplicate it a lot it humms and buzzes when I open any door, unlock, and even the open the hood!!!?

So what is it really doing with that humm buzzz
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JDN explained the noise above as it pertains to SMG cars...
Old 12-28-2004, 08:30 PM
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I posted on this months ago and never found an answer...not an SMG thing all 3 of my E60's have been step and all 3 have done/do this
Old 12-28-2004, 08:36 PM
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I dont have SMG. I was told its the Active Steering servos starting up.
Old 12-28-2004, 08:53 PM
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My 2004 325 SMG makes the same noise when you either unlock or when you open the driver's door. I have always thought it had something to do with smg.
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