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DIY E-Box Fan Replacement

14K views 7 replies 6 participants last post by  diff  
#1 ·
I just did this the other day on my 2007 HSE after the chirping and whistling on the passenger side drove me crazy for about a month. It took me about an hour and fifteen minutes. Not very complicated.

Part# YQO000030 $200.00 US - "Fan Cooling Under Hood"

***** I am not a certified automotive technician. Attempt the following at your own risk. *****

- Open the hood. Make sure your car has been off for at least 15 minutes to let the engine bay cool down. Locate the E-Box and remove about 10 alan screws from the e-box lid.



- When you remove the lid, you'll see a fusebox and a few wiring harnesses. I was able to accomplish the fan replacement without removing or unplugging any of the harnesses (just twisting and turning them without straining them).

- Notice the white plastic holder with two modules. Remove the larger of the two modules first, it should just lift and slide right out. I set it as close to the front of the car as I could to keep it out of the way.





- Then remove the smaller module and set it toward the back of the engine bay. This one was a bit more tough to pull out due to the tension of the harnesses, so be careful, but it's doable.





- Then you'll want to remove the two philips screws holding the white plastic holder in place and set the holder aside.

- Now, look in the bottom of the box and you'll see the fan unit. It's got three philips screws holding it in, two on opposite sides of the actual unit, and one attracted to the "exhaust" pipe attached to it Remove the three philips screws.



- The fan unit also has a little harness plugged into a connector that is also attached to a larger blue harness. I removed the smaller connector assembly from the larger blue one before trying to unplug the fan harness from it because it's hard to maneuver your hands in that tight of a space. You'll probably want to unplug the fan harness before pulling it out of the bottom.





- That's it for removal. Now put the new fan unit in, plug in its wiring harness, and use the three screws to fasten it down. Then put everything back and you're done.

All of the photos were taken from an iPhone 5, so I apologize in advance for the poor lighting. I figured it was better than nothing and wanted to post my first DIY.
 
#3 ·
I tried one more step and that was to remove the fan motor from the housing and clean and lubricate it. So far, no more noise. I'm sure it won't last as long as a new motor, but it was easy enough to get to that it was worth the work. Also, with a little research, a BMW equivalent can be found for the 2003-2005 models.

Oh, and NICE WRITEUP!! Well explained....
Scott
 
#6 ·
i took mine apart and used some synthetic motor oil on the bushings but the brushes were so worn i had to replace it. i think the carbon particles from the worn brushes and the heat inside the ebox contribute to the squeak issue so check the condition of the brushes and that they are free to slide in their guides. quite an expensive part for what it is and at least on bmw engined ones the same fan is used to cool the air compressor in the trunk so that might answer a puzzle for someone.
 
#7 ·
Thank you, I'll see if I can lubricate the fan and check the condition of the brushes. I'll most likely end up buying a new fan but I always like to check if things are "broken" or Broken. I may ask my ex. electrical engineer father to see if he can replace the brushes, he's always in for a challenge for fun, it'll be interesting!
 
#8 ·
Almost like doing surgery. The parts are very small and delicate but why not