Changing the cabin filter on BMW 3 Series 320 d e46

Locate the cabin filter at the bottom.

Locate the 3 small plastic screws.

Turn them 1/4 turn to the right (facing the image).

Either the spring on each screw will come out on its own, or you'll need to give it a little nudge.

Grab the plate with both hands and pull towards you. There may be a little resistance so don't hesitate

Pulling it comes by itself.

If the case is a little dirty, don't hesitate to wipe it with a cloth.

Compare the new and old filter (length, thickness)

we notice that the filter is curved. The curved side will be placed on the headlight side and the hollow side on the driver's side.

Now what is the top what is the bottom of the filter?

You will notice a small hollow on the 2 supports in the housing on each side (where the 2 left and right ends of the filter fit together).

On the filter, you observe on which side the little "nipple" is located that fits into it.

Insert it.

Reposition the plate as it was (by pushing this time, it slides on its own) then close the 3 small plastic screws by pushing them in then turning them 1/4 turn to the left (facing the image).