2020 Mazda Key Fob housing
thingiverse
Got a 2020 Mazda but hate that the key fob is so bloated? Print these two parts at .12mm layer height with a .4mm nozzle. Take apart your original key (all the parts snap off) and remove the circuit board, place it into the fob base battery side up. Remove the battery contact from the original key and insert it into the similar shaped slot on the fob top, and slide the battery into the fob top so that the negative (bottom) side of the battery touches the contacts on the circuit board. I just used hot glue to combine the two sides and trimmed off excess glue with an x-acto knife. Final dimensions 32mm x 60mm x 8mm (original key is 43 x 73 x 18). Note this does not retain function for the buttons, you'll have to use the button on the handles to lock/unlock (or set the auto-lock feature). This is completely and safely reversible, as long as you didn't damage the original key.
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