Hello folks,

Just wondering if anybody knows if fitting an aftermarket air filter would void the my extended warranty because its not a Ford part?

I fancy getting one of the Green Cotton air filters...seem to be getting great reviews on here....

if im right..someone correct me if im wrong.but im sure a k&n filter doesnt void the warrenty.

As an air filter is classed as a consumable it shouldn't affect the warranty, but as you say it's not a Ford supplied filter they may do their usual thing of being pedantic and picky.
I do believe that k&n filters come with a chit stating that if any damage is done to an engine that can be attributed to their filters them they will cover it under their own warranty.

No the kn filter will not void warranty and you can run the filter for a long time