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Discussion Starter · #1 ·
Hi guys. I posted a while ago about a high pitched whine coming from above the foot rest under the drivers side of the dash and it turns out that it is the ECU cooling fan (post #13 in the link) that draws air from the interior into the ECU compartment in the engine compartment. Has anybody changed this fan and if so is their a DIY/ procedure for it.

Ant help would be appreciated.

http://forum.e46fanatics.com/showthread.php?t=776932&highlight=high+pitched+whine
 

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Does it sound like some kind of electronic whine?

Near the headlight switch?
 

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Does it sound like some kind of electronic whine?

Near the headlight switch?

It sounds like crickets or an electronic whine, coming from where your feet are.

Look at the diagram in the link. The fan itself has bearings which get dry or loose and cause the noise.
 

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Discussion Starter · #6 ·
Changed the blower yesterday after buying it from Tischer. Has made such a difference thank you.
 
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