Automotive Forums

It's time to replace my airfilter in my Toyota Tacoma, and thinking I would go with a K&N for better air flow I found a secondary airfilter right after the primary (normal stock airfilter).

Has anyone seen this with Toyota's?  What is its purpose? Can it be removed without damaging the engine.  Seems this would restrict air flow even greater.  Thoughts?  

interesting, never heard of it.  What does it look like? Are you sure its not your maf sensor housing?  Im gonna go do some research.  

It's rectangle in shape with what looks like a screen material (similar to the filter found in a homes furnace).  It sits right behind the paper air filter (maybe an inch gap between them).  The MAF sensor is about 12-15 inches further down the intake.  I have never seen anything like this, so any information would be great.  

what year is your tacoma?  

ive searched and searched, came up with nothing, my better guess would be to say that its not an air filter since all the K&N air filter replacements only come with one filter.  

Thanks.  I agree with you, seems to be a screen (since it can not be removed, cleaned, replaced).  Just seems to me it restricts air flow, but who am I.  Again, thanks for your feedback.  

thats why im here  

2006 Double-Cab 4x4, 4.0L V6  

FYI....  Here is what my research has found.  The 2nd filter you see is an emissions hydrocarbon filter.  It must remain in the vehicle to maintain smog compliance.  

ah mysteru of the second filter is solved...