Cabin air filter
 

I noticed that the 2010s come with a microfilter, dont we have a cabin filter in the 09s and cant we just switch filters?

there is a trap door for the filter behind the glove box but no filter in there hope the one for the 2010 fits in the 09:tup:

Acura TLs have had these filters ... on the "B" service every 25K, you're supposed to change this $10 filter.

It's about $150+ to have the dealer do the B. Oil change, rotate tires, "check fluid levels", and replace the cabin filter. You have to remove the glove compartment door, then pull the glove compartment out, then wriggle and twist the plastic of the dash until you can get the filter out and put the new one in. Slightly intimidating in the sense you're worried you'll snap off some piece of plastic, but not hard.

If you study the online instructions for half an hour, you can do it yourself in ten minutes (and save the $150). They don't want you to do that ... which is why it's designed into such a relatively inaccessible place.

Once you have a new cabin air filter in, you'll easily be able to see the Emperor's New Clothes! As an added bonus ... your wallet will feel refreshingly lighter! And for a few minutes, you'll feel light-headed, as if the filter actually made a difference in your ability to breathe, or maybe in the shocked realization you just paid a whole lotta money for nothing much.

My frontier I traded in had one, or at least the dealer told me it had one. my 325 had one and it was a total bitch to get to.