[DeKa]

Yes. I believe the Focus didn’t have the filter as standard fitment but as it’s the same platform as Mazda 3 and Volvo V40 of the day, they’re easy to come by.

It’s probably got leaves and rubbish in the bottom so wipe it out, then if there’s a smell spray an aircon deodoriser in there whilst running the system.

Once you fit a cabin filter don’t forget to change it once every year or two.