Highboy
Site Donor 2022
I've seen many posts about K&N filters oiling up MAF sensors. Just changed my air filter on my Highlander and has some sort of carbon filter fastened to the top of the air filter box. My Scions have the same. I read on some Toyota forums it had something to do with emissions. So my question is how is oil from the K&N filter getting on the MAF sensor if it has to go through that carbon filter in the top of the air filter box? Maybe other car brands don't have this carbon filter.