if your car has got air con and you had the pollen filter changed, check to make sure the cover was put back on properly
On a 2002 Ford Focus : In the front passenger footwell , behind the kick panel ( there is an access hole )
In the right front passenger footwell , behind the kick panel ( there is an access )
In the front passenger footwell , behind the kick panel access cover
In the front passenger footwell behind the kick panel ( there is an access plug in the kick panel to remove )
On the RHS of the passenger footwell behind a cover - check your owner's manual!
In the right front passenger footwell , behind the kick panel access cover
In the right front passenger footwell , behind the kick panel access cover
Ford usually place them in the passenger side footwell just in front of the door behind a plastic cover. It could be different in the Focus though as I've not worked on one.
On a 2006 Ford Focus : The fuel pump shut off switch ( inertia switch ) is located in the front passenger's footwell behind the kick panel ( there is an access hole )
In the front passenger footwell behind the kick panel ( I believe there is a removable plug in the kick panel )
Passenger footwell outer panel
It's the interior trim panel in front of the front doors . There is one in the drivers footwell and one in the passenger footwell