Geezuz....
All of you are/have been making this WAY TO DIFFICULT for the OP.
Ford did not restamp their front 1/4's and/or change the sizes of the faux fender vents over various model years.
The ONLY change was the verbiage of 'TAURUS' to 'SHO' in model year 2013. It remains 'SHO' from '13 to current '18.
'10-'12's had "TAURUS".
The SHAPE, as well as the SIZE ITSELF, NEVER CHANGED, over the various model years.
There is one solitary guide pin at the rear of the piece, Tabs on the upper and lower. Refer to my pics as a guide.
There is NO NEED WHATSOEVER to remove the wheel/inner fender skin, or any other silliness. This is a 10min job to swap, for both sides, at most.
Place a credit card, or even a small PLASTIC putty knife at the rear of the emblem, and pry outwards. That's it. It snaps right out. Pop the replacement in place. Done. Goodness.


Sent from my SM-N920V using Tapatalk