I know it is a tight fit, but I have been able to release the three clips and then carefully work the section apart to remove the entire cone housing. To reassemble, it helps to use a very light amount of silicon (spray or liquid, as in tire magic or detailers silicon) on the part that stays in the fender (inside, especially the lower part) and the outside part of the cone that goes into the fender piece. Apply the silicon gently with your finger, do not spray. Oxygen sensors do not like silicon so use just enough to help the parts slide together and no more.
