My goal was to create something that fits in my wallet reasonably well. The result is not beautiful by any means, but it fits my needs.

Features

• Created a coffin shaped case to follow PCB shape while reducing volume
• Small slant at the bottom to reduce the strain of sharp corners on my wallet
• Left the buttons exposed in the event my phone dies
• Created a slot for the door key
• Made the case serviceable with removal of screws

I recommend shrink tubing the key to protect the opening for the buttons. I solely use the proximity unlock and lock with the interior button or my phone.

I have not tested any other fob PCBs aside from the 2025 Bronco Sport OB.

Inspiration: oriolmachin from thingiverse