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How to Install Defenderworx Locking Fuel Door w/ Mustang Logo -Two Tone on your Mustang

Installation Time

20 minutes

Tools Required
  • 9/32 Socket or Box Wrench
  • Flathead Screwdriver or Plastic Prybar
  • 1/8 Allen Wrench
  • 2” Masking Tape
American Muscle
Shop Parts in this Guide

Step 1:
Tape around opening to protect your Mustang from any damage when you remove the factory door or if you mishandle any tools around the opening.


Step 2:
Open Factory door and remove 9/32 bolts in 2 locations. These are noted in the picture where we have our socket and the arrow.


Step 3:
Remove factory rubber housing by using a plastic prybar or flat head screwdriver covered in masking tape or with a thin rag. Notice the locations that are being pried upon. These need to be pulled out away from the body so the factory fuel door can be removed.


Step 3 B:
Once you pry the housing up, you will need to pull the rubber housing out of the body of the car. The housing surrounds the filler tube and needs to be pulled away to expose the areas for your fuel door to be installed. It did take some effort to pull it away. This step took about 3-4 minutes just mainly as we were being careful not to damage the vehicle.


Step 4:
Remove factory fuel door from housing once you have the rubber insert removed. You may need to bend the bracket slightly to get around the filler tube, but it will come out in a few seconds. Note, the filler tube has some slight back and forth movement do not be afraid that anything will break in this step.

Step 5:
Remove allen bolts from the front of the Defenderworx fuel door. Note, there are only 3 bolts that need to be removed and they are holding the U clips needed for install on the back of the door. See image.


Step 6:
The image shows the 3 locations that the U clips need to be installed in. Once the U clips are installed, you can use the allen bolts to line up and install your Defenderworx fuel door.


Step 6 B:
Note the image now showing the U Clips installed. These slide right into the factory locations and are now ready to receive the fuel door bolts and secure it to the vehicle.


Step 7:
Install your Defenderworx fuel door. The arrows show the 3 locations that will be physically attached to the body of the car.

We have supplied 2 washers that will act as shims if your door is not sitting flush with the body.


Step 8:
Snug up your allen bolts, remove the tape and clean up your work area. Close the door, lock it, and enjoy your newest addtion to your Pony!

Thank you for choosing a Genuine Licensed Defenderworx product!


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