Cabin filter change and Air Flow direction HELP
 

Hi all, I just replaced my cabin air filter but did not pay attention when removing the old one what was the airflow direction. I googled it and most results were to make sure I notice the direction when removing....well I did not. Another video was showing to put with arrows up, but another one with arrows down, so now I'm confused.
If someone knows, please tell me.
Right now I left it with arrows pointing up. hope that is correct.

Arrow pointing 'up' is the correct position.

Thank you. Thats how I have it installed.

You might take a slim & narrow nozzle attachment, using your shop vac, and vacuum down in the cabin filter slot; every time I have changed mine there was a remarkable collection of leaves and debris and grit, down at bottom of that slot...
GL, mD

I believe the arrows point in the direction of the flow.

I'm not sure if your model is the same but on the X3 there is a tab on the filter that fits into a notch in the housing. Here is DIY guide i put together with some photos:

BMW X3 Cabin Air Filter Change DIY Guide

I know that's overkill for a filter replacement, but i just wanted to document the process so anyone thinking about doing it could see how easy it is. Hope it helps someone.

I'm not sure if your model is the same but on the X3 there is a tab on the filter that fits into a notch in the housing. Here is DIY guide i put together with some photos:

BMW X3 Cabin Air Filter Change DIY Guide

I know that's overkill for a filter replacement, but i just wanted to document the process so anyone thinking about doing it could see how easy it is. Hope it helps someone.

I was wondering/thinking the same thing. However, the filter I just bought (an OEM BMW paper version) has the arrow pointing down. If turned up the labeling would be upside down which doesn't make sense.

:iagree:

So if you installed it with the arrow pointing up you got it backward.

I installed it with the arrow pointing down.