2001 Subaru Forester Key replacement (RFID DOES NOT WORK)

This is a 3d print made from PLA on my Ender 3 to fix the casing for my 2001 Subaru forester key. I'm sure there are also other model cars with the same key. I used M3 x 8mm screws and nyloc nuts. The remote central locking works great however the RFID IMMOBILISER does not work. I ended up giving up after trying to move the RFID chip to countless different locations around the key, I hope someone else out there might understand the tech better than me and have a go themselves, my guess is the filament is restricting the signal or something similar, though i did drill holes to try and help yet this is was to no benefit. Good luck!