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Replacing cabin air filter in a 2003 Lexus ES 300 with an aftermarket filter. New filter has an arrow indicating air flow. Should the filter be installed with the arrow pointing UP or DOWN? Several conflicting opinions on other sites. 

cabin air filter.jpg

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BeachBumForever,

 

Check the old one you took out.

Its dirty side is the side that pulls the air from the outside into the car. Which way does the arrow on it point in relation to the dirty side of the old filter?

That'll show you which way to install the new filter.

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Installed the new aftermarket filter with the arrow for air flow pointing down and seems to be working. Blower is then moving air from ABOVE to Below the filter into the cabin. Any other comments or opinions?

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