does my 2006 impreza have a cabin air filter and if it does where is it?

Does your 2006 Impreza have an owners manual?  It will explain it in there.  If you don't have the owners manual, the cabin filter will be behind the glove box.  Your glove box should have a tool less way to remove it, but if it doesn't, it usually only requires a phillips head screwdriver.

Just did the cabin filter on my 2005 outback today. it took about 30 min to get to it behind the glovebox (lots had to come out to get to it). 

 

When I got to it the box was dusty as hell with no filter in it. 

check www.cars101.com for cabin air filter instructions across several mode/years

 

I like have our vacuum cleaner with small nozzle attachment ready when I do ththat filter service, just to clean-up the area as best as I can reach.

Edited March 20, 201610 yr by 1 Lucky Texan

If you have the filter or option to run one, get in habit of changing every 1-2 years. You wouldn't believe how gross they can get. It's pretty amazing people don't get really sick more often from the crud they hold as they can get moldy and all sorts of junk stick to them.

I did the 2006 outback sedan we have what a PITA!  The 2004 outback wagon was much easier, it only took 15 minutes and that was the 1st time I did one.  The 2004 was so bad I had to loosen the debris in the compartment with a plastic trim removal tool before I could vacuum it!  Gross is an understatement!