of the scheduled maintenance functions on the BMW E36 3 series is replacing
the micro filter. Changing out the micro filter helps to keep the
ventilation system clean and removes allergens and dust from the system. If
you notice dust coming through the vents when you activate the climate
control, itís a good chance that the micro filter needs replacement. |
the micro filter is relatively easy procedure, which should only take about
an hour to perform. The micro filter is located right in front of the center
console, and directly below the center of the windshield.
order to gain access to the micro filter, it will be necessary to remove the
glove box assembly. In order to do this, first take out all the maps,
registration papers etc.., then remove the two small screws around the
frame, on the left and right sides. Once these are removed, look inside the
vents above. In the upper right and left corners on each side, you will see
two screws in there. Remove them. Next, remove the two screws under the
dash, holding the fiberboard under panel to the bottom edge of the plastic
the screws removed, the next step is to remove the upper vent panel. With
all the screws removed the panel should come right out.
you will want to remove the center glove box piece. This is the piece that
normally would hold your registration, maps, etc.. What you will need to do
is first remove the glove box light. If you look at the right side near the
rear of the light, you will notice a small tab. Use your finger to pull it
down, and the light will fall out. Disconnect the electrical plug and put
the light in a safe place. Now, if you look up, you will see a 10mm bolt
directly above the light. Remove this nut, and you will be able to remove
the entire panel.
the panel removed, the next step is to remove the passenger side floor air
vent. This will give you the clearance need to remove the filter. Simply
pull down on the vent where it attaches to the center console, and it will
come loose. Carefully work it out of the center console.
you can remove the cover plate for the micro filter. It is a small circular
knob that rotates counter-clockwise. Twist it and remove the entire panel.
Use your fingers to feel for a small plastic tab where the cover went. This
is the old filter. You may have to play with it for a bit to remove the old
filter, however with a little force, it will pull out. As you are pulling it
out, you will notice that it will appear as though the filter surround is
broken, this is normal. In order to install the filter, it must be bent. A
provision was made into the filter to allow it to bend enough to get it into
and out of the filter housing.
a good idea to lay down a towel or rag to catch any loose debris that may be
in the filter housing. In this case, a bunch of leaves and dirt fell out.
Now we are ready to install the new filter.
install the new filter, you will first need to snap the housing to allow for
the bend that will allow you to install it in such a close space. Just a
little pressure and it will snap.
place the filter in the filter housing, bending the portion of the filter to
fit it in place. It should slide in effortlessly. Now re-install the housing
cover and turn the locking knob. Next, re-install the passenger side floor
air vent, and snap it back into its connector.
done, simply place the glove box back in place and re-attach the 10mm bolt.
Re-attach the glove box light electrical connection and re-install the
re-attach the upper vent piece. Make sure that the mechanical connections
for the vents are attached and are not misaligned. Re-install the lower
cardboard panel under the glove box as well.
last step is to re-install the screws around the perimeter of the glove box
and upper vent piece.
Well, there you have it - it's
really not too difficult at all. If you would like
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