The tether that dangles the fuel cap when you fuel the car often ages and breaks. Our Fiat 500 had this issue so I drew this up to fix it. I expect that other Fiat models use the same part, drop a note in the comments if you know. The settings are for Generic TPU, so you might wish to change them for a cleaner print (buying a 1Kg real for a 3g print was a bit much so I used a random bit of sample filament, hence generic…).

To fit this part, remove the retaining ring from the fuel cap, carefully push out the two plastic retaining pins to remove the old tether, then reverse the process to fit the new print.