I got told that means there knackered as its a spring inside them and obviously if it sounds rattly it ain't very springy lol
Its funny this should come up as i dug one of my old jackets out to wear whilst i did a couple of bits and bobs and guess what was in the pocket still



Along with the little bag with the part number on



I don't know how much they'll be from ford now but i think mine was £20 going through my friend that worked there.

Mark.