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DIY 3M cabin air filter

Discussion in 'Hong Kong' started by Titus, Jan 21, 2016.

  1. Titus

    Titus Member

    Joined:
    Sep 22, 2015
    Messages:
    203
    Location:
    Hong Kong SAR
    After 5k kms, the 2 layers of 3M air filters (from Japan City) has turned black.... the carbon element lasted about 10 days before the smells started coming through; the first 10 days the air smelled crisp even going through tunnels

    Just cut 2 pieces to size and wrap over the OEM cabin air filter

    10572246_10156605425365045_3018065329531825201_o.jpg 12622456_10156605425430045_8483649215828511776_o.jpg
     
  2. Mille Pun

    Mille Pun Member

    Joined:
    Jun 21, 2015
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    Location:
    HK
    Where is the filter of the car located?
     
  3. CHG-ON

    CHG-ON Still in love after all these miles

    Joined:
    Jun 24, 2014
    Messages:
    2,754
    Location:
    Santa Cruz Mountains, USA
    Great hack. Thank you. Any issues slipping it back into the filter slot? Are you thinking that it needs to be replaced every ten days? That's a bummer.
     
  4. Titus

    Titus Member

    Joined:
    Sep 22, 2015
    Messages:
    203
    Location:
    Hong Kong SAR

    Here you go!

    It helps if you remove all 3 trim pieces, but the second time I did it, I only took out the right and middle trims.

    I suppose you can DIY some sound deadening in there too, seems to be lots of empty spaces and exposed sheet metal to transmit noises

    11222341_10156354801110045_2509175157119016766_n.jpg 12196303_10156354801050045_5010980709639101541_n.jpg

    - - - Updated - - -

    From the even "blackness" of the filter, it didn't seem it was making any hot spots; I feared it might create uneven air flow but ended up ok. The concerning thing is that I wrapped the filter on top of the OEM filter which means the air going through should've been filtered by the OEM element already and it was still blackening up the filter. Then again this is Hong Kong....

    Ideally yes 10 days would be where the activated carbon portion is saturated with pollutants but yea that would be a hassle unless someone did it for me for free LOL. But just for dust/fine particle filtration the filter would still be good for about 2 months I think. I can't imagine how the Model X's HEPA and bio defense filters would work out...
     
  5. samleemc

    samleemc Member

    Joined:
    Dec 30, 2015
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    Location:
    Hong Kong
    I don't think that's design for HK...or China...
     
  6. ediot

    ediot Member

    Joined:
    Nov 1, 2015
    Messages:
    137
    Location:
    HONG KONG
    Thanks for sharing. I'll probably have a look at this when i have some free time.

    I got a vacuum cleaner at home that uses water as its filtering system (it's just a simple mechanic, like a bong... or hookah pipe). i wonder if something similar is at all feasible for cars - obviously you'd have to deal with water sloshing around and using a more powerful suction pump which drains more power.
     
  7. gmontem

    gmontem Model S P01707

    Joined:
    Mar 24, 2011
    Messages:
    229
    Location:
    Castro Valley, CA
    Do you have a part number for this 3M Filtrete? I am having trouble trying to find it online. Thanks. :)
     

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