The dealer is always full of it. They tried to blame my regular Fram filter for screwing up the MAS, when in fact the ecm was recalled on the supercharged trucks, and it hadnt been done yet, leading to the Check Engine Light I received..

They said the "aftermarket" fram filter was made of cheaper paper than the nissan filter, and little pieces broke off resulting in a broken MAS not covered under warranty. Bullshit..