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Thread: DIY - BMW E34 M5 Blower Motor Replacement

  1. #1
    Join Date
    Dec 2006
    Airplanes & Hotel Rooms
    My Cars
    E34 M5T

    DIY - BMW E34 M5 Blower Motor Replacement

    Decided to finally tackle this project yesterday. My blower motor was working at all speeds but at certain settings had developed a squeaking noise (bearing failure) which my radio was working harder and harder to drown-out. Additionally, I still had a faint funky smell even after I removed the mouse nest I found in the cabin filter last month.
    Overall the job took me 3.5 hours, but at least an hour of that time was spend cleaning.
    Before proceeding I searched for other post and found a couple which I felt were helpful. I would suggest giving them a read in addition to this thread as I have tried not to duplicate directions.
    Other Posts
    Good overview with pictures; not M5 specific
    1 - Gale's BMW Repair Page
    Similar overview of the steps, however removal of intake is not needed.
    2 - Piancu's Blower Motor Replacement

    My Process
    1. Remove wiper arms, cowling plastic and engine bay rubber trim.

    2. Remove the 10mm plastic nuts which secure the wiring harness tray and cut the zip / cable ties in order to free the harness

    3. With the cable tray removed you next remove the bulkhead insert. This part is held with 5 screws (8mm?) I would suggest using a magnet to catch the screws on the bottom.

    4. Remove the 10mm nut which secures the vacuum lines.

    5. With the wiring harness pulled back and the bulk head insert removed you will now see this plastic cover with is lightly glued on, simply pull it off.

    6. Release the white strap and two clips on the bottom to remove the access cover to the blower motor. (Photo Credit - Gale's BMW Repair)

    7. Voila! Your blower motor. [You can see clearly my two issues - bearing failure (left side) and mouse nest (right side)

    8. Clean!!! Take the opportunity to hose everything down and remove the 20+ years of grim which has built up in the area. As you can see in the photo I also removed the cabin filter in order to have direct access to clean the coils.

    9. Temporarily tape the straps up and out of the way.

    10. To install the new blower I put the right wheel in first then pivoted the unit counter-clock wise to then push the left wheel in second. Be gentle, yet deliberate and the plastic will deform to allow insertion.

    11. Remaining steps are the reverse of removal. Enjoy!

  2. #2
    Join Date
    Feb 2003
    denver, co
    My Cars
    Nice write-up.

  3. #3
    Join Date
    Oct 2007
    Middle TN
    My Cars
    Too many/Not enough
    Thank you, thank you, thank you!!
    I have fan squeal and I've been putting off this repair and It has to be done before a trip I'm taking in September. This is exactly what it need to get it done....hopefully I don't have a rat nest.
    Current Garage:
    91 e34 M5 - spoiled & demanding 27 y/o -glanzshwarz
    91 850i/6 -another spoiled & demanding 27 y/o- schwarz-gone but never forgotten
    06 325i - undeserving, spoiled & demanding 27 y/o daughter's DD-hellrot
    03 MINI Cooper S JCW -spoiled & demanding, yet deserving wife's DD - Chili/Panther
    05 X3 3.0i -family workhorse - diamond schwarz
    12 X5 3.5d - torque monster - space gray metallic
    86 GMC Cabellero - Old Faithful 32 y/o DD BMW Support Vehicle
    08 Cub Cadet 19HP 46" hydrostatic- yard vehicle
    88 Schwinn Sierra - 1WD Off Road Vehicle
    e31 & OHC BMW CCA #385540

  4. #4
    Join Date
    Apr 2015
    United States
    My Cars
    1993 BMW 525i
    Thank you. On my car at least, I was not able to remove the spring clip holding the motor secure, until I noticed a small hole in the end of the spring tab. I inserted a hook pick into the hole and pulled it loose.

  5. #5
    Join Date
    Jan 2005
    My Cars
    11/88 E32 750iL+98 E36M3


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