2004 F-150 XLT

The service manual is the one to believe. Alldata sometimes has the wrong information in the archives.

East-

Ford factory WSM states that "The air distribution system of this vehicle cannot be equipped with a cabin air filter". That's about as close to a cut and paste as I'm comfortable with.

There are many things automotive that are designed to be like panty-hose.... one size fits all..... this has proven to be untrue for panty-hose and it is also untrue for service schedules. Service literature is becoming an electronic "cut and paste" affair with the cutting and pasting done by those better at cutting and pasting than those with any automotive knowledge. Add that consumers often overlook disclaimers such as "where equipped" or similar statements.

In either case, without viewing the document and reading it with lawyer-ese precision, I can't comment further.

When in doubt RTFM..... this is an acronym roughly meaning that one should avail themselves of their owners manual (likely the single most expensive UNREAD book ever printed). If your owners manual doesn't include any notations about a pollen air filter, there is a very good chance that you don't have one.

This fantastically useless little number will include un-necessary info like "how to get into 4WD low".... "how to disable the belt minder".... and what to do if things aren't working right.....