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Faults, Fixes and DIY Please share your experience and knowledge with other members by contributing your own DIY, or by helping another member find the elusive fix!


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Old Tue, Apr-15-2008, 07:38:10 AM   #1
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Default DIY: Stopping cricket noise II

Thanks to samytampafl on the E46 fanatics who found the source of the annoying cricket noise behind the dashboard. His post shows how to remove the fan that causes the cricket sounding noise and replace it with a new one.

I realized the only thing wrong with it is that the bearing in the motor has dried out. If you don't feel like spending $80+ on a new fan, this DIY shows you how, for about $5 worth of electronics parts cleaner and dry lube and about 10 minutes, you can clean and relube the bearing in the motor for quiet free operation again.

Rather than cross link the original thread, I'll post his steps here, and continue with mine.

1: remove the plastic cover just above the pedals..


2. remove the 3 screws from the blower...Warning! Once blower is free, do not pull it out. It is still connected by an electrical connector


3. open hood.. head out to the front of the car.. find the electric box and remove the 4 hex screws, then remove the plastic cover


cover removed:


4. disconnect the electical connector to the fan



5. after you unplug the connector, you can remove the fan from inside the vehicle. you can either replace it with a new one, or proceed to cleaning/relubing the bearing like i chose to do.


edit: updated on the part numbers

It looks like there are two versions - one with a 3-prong connector and one with a 2 prong connector.

To check which you need, go to www.realoem.com and look up the part making sure you choose the correct year/model. From the main group, go to #12 - Engine Electrical System, then go to the Subgroup and choose 12-35 Control Unit Box.

You're looking for part #5 called the "Cover with blower".



It looks like for cars up to 2003, the correct part number is 12907571019
For cars 2003 and up, the correct part number is 12907570074

Double check with RealOEM or your local dealer to be sure.
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Last edited by Got_S54?; Sun, Jul-13-2014 at 01:12:51 AM. Reason: updated pic links
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Old Tue, Apr-15-2008, 07:39:01 AM   #2
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6. remove the blower from the cover by removing the single screw


7. separate the blower housing by prying the furthest tab at the end while separating both halves


8. move onto the next one and the next one until you can separate the housing


9. remove the motor cover as well by prying the tabs carefully



10. with the motor cover removed, remove the foam spacer and carefully remove the circuit board



11. spray electronics parts cleaner on the motor and focus on the bearing. you'll see dirty fluid drip out. spin the fan by hand as well to make sure it's nice and clean and dry, although electronics parts cleaner evaporates very fast.


12. make sure it's dry, then carefully spray some dry lubricant directly on the bearing. this stuff is great because it drips into the bearing to penetrate, then the fluid evaporates leaving only the lubricant. spin the fan by hand (in my case, i connected the fan to a 12v souce, and sprayed the lubricant while it was spinning.


13. motors generally have 2 bearings - front and rear. i tried to remove the fan to get to the front bearing, but couldn't and didn't want to risk breaking it, so i sprayed the electronic cleaner toward the center of the fan, then the lubricant (while it was spinning)
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Last edited by Got_S54?; Sun, Jul-13-2014 at 01:15:25 AM.
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Old Tue, Apr-15-2008, 07:42:51 AM   #3
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test the fan if you can by connecting it to a 12v source before putting it back on the car. i used a car battery charger with little alligator clips

video 1

Reassemble the fan unit and test again. No more cricket noise!!!

video 2

Re-install the fan and enjoy cricket-free operation.
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Last edited by Got_S54?; Wed, May-07-2014 at 11:22:38 PM.
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Old Tue, Apr-15-2008, 07:45:40 AM   #4
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good stuff Joseph!
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Old Wed, Apr-16-2008, 01:55:29 AM   #5
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awesome post!!!
thanks!
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Old Wed, Jul-30-2008, 02:52:41 AM   #6
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Nicely detailed DIY post.
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Old Fri, Sep-19-2008, 01:19:33 PM   #7
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Thanks for the DIY
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Old Sat, Sep-20-2008, 05:24:29 PM   #8
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FYI, there are two versions of the fan. One with a 3 prong connector and one with two;




my dealer gave me the wrong one when they looked it up by VIN, I had to go back and they found the correct one.
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Old Fri, Sep-26-2008, 03:45:29 AM   #9
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Thank you, this noise has been bugging me like crazy lately.
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Old Sun, Oct-12-2008, 01:01:56 PM   #10
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Great post. I hate crickets!
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Discussing DIY: Stopping cricket noise II in the Faults, Fixes and DIY Forum - Please share your experience and knowledge with other members by contributing your own DIY, or by helping another member find the elusive fix! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)