I recently installed a Motorcraft OEM locking gas cap part number is 8L3Z-9030-E. It looks just like the stock cap, plus the lanyard is positioned correctly for the way our fuel door opens.
I pryed off the button that secures the plastic strap with a plastic prybar and popped the new one in place - simple!
I pryed off the button that secures the plastic strap with a plastic prybar and popped the new one in place - simple!