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7 Series - F01 / F02 (2009 - 2015)
The 5th generation F01/F02 BMW 7 Series flagship forum. The redesigned 7 series leads off the BMW Fxx chassis code, offering an 8 speed automatic transmission and all turbocharged engine options.

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  #1  
Old 09-24-2015, 05:24 PM
509750 509750 is offline
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Location: WA
 
Join Date: May 2012
Posts: 15
Mein Auto: 2009 750li
Blower fan sounds like an airplane & now a restraint issue

Out of the blue I start up my car and when I turn the blower on (for both AC or heat) there is a loud, deep sound coming from under the dash on the passenger side (more towards the center console). I removed the lower part of the dash and removed the in cabin filters and it still made the noise. I also looked in the air intake under the plastic grate at the top of the hood area. Didn't see any debris in there but you cant see down it very far. It sounds like a prop airplane and gets louder on higher settings. Think its a bad blower motor or just debris? I couldn't even find the blower motor, it looks like youd have to take the center console apart?

Then when I put the lower dash panels back on and plugged in the 3 plugs I get a "passenger restraint" error. I assume this would be related to one of the plugs on the lower dash panel?
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  #2  
Old 09-26-2015, 01:04 PM
jsmcgill jsmcgill is offline
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Location: Louisiana
 
Join Date: Sep 2015
Posts: 2
Mein Auto: 2010 760Li
Ever solve the jet engine problem?

I have the same issue. Did you find the problem? I think there is debris in the blower fan, but there is a fuse panel on top blocking access and I'm not sure what that is.
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  #3  
Old 09-28-2015, 06:59 AM
rolypoly920 rolypoly920 is offline
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Location: Huntsville, Alabama
 
Join Date: Dec 2013
Posts: 55
Mein Auto: 2011 740Li
I recently had to replace the blower motor about two months ago and that is what I did. BMW needs to redesign the filter element....mine had crumbled also and there were pieces all over.....unfortunately cleaning up the pieces DID NOT fix the rumble....I had to replace the blower. I found a good price at FCP Groton online...only $109. In addition I replaced the blower cover that had the mesh filter.....need that to stop leaves coming into blower. I got a new one at the dealer....$30.....but that piece needs to be made out of metal or something else because the high temperatures under the hood make that crumble and fall to pieces....not good.
Anyway, it could just be the debris in the motor...but I didnt want to put everything back together again (time factor) and have the same problem since when I took the old blower motor out there was nothing in there. You could try and vacuum things out....but it may also be the blower.
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Old 11-04-2015, 08:45 AM
509750 509750 is offline
Registered User
Location: WA
 
Join Date: May 2012
Posts: 15
Mein Auto: 2009 750li
Where is the blower motor located exactly? How do you access and remove it?

The issue still remains, although one day I left the car out in the rain and the sound went away for a day. Next day after parking it in my garage it was back and has been ever since. Don't know if that was just a coincidence or not.
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  #5  
Old 11-04-2015, 11:24 AM
rolypoly920 rolypoly920 is offline
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Location: Huntsville, Alabama
 
Join Date: Dec 2013
Posts: 55
Mein Auto: 2011 740Li
The blower motor....by convention....is located on the right side of the car right near the firewall. Open the hood and look on the right side of the car (passenger) right near the firewall and there is a box located there. There is a cover over it with a foam filter that disintegrates over time....so there might be a clear opening into the fan assembly. If you PM me with your e-mail address I can send you some instructions on how to get to it....but that wont be until next week since I am having computer problems at home and that is where the instructions are....until I get that done no computer access.

Anyway, I ended up having to replace the motor......about 1 1/2 hour job.
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