My girlfriend's broke too. Her Fiat is a 2016 500x. The rubber boot that goes on the switch became unglued from the switch. I tried to glue it back 3 times, using two different type glues, but ultimately it wouldn't stick and eventually kept falling off. Unfortunately over the past couple decades, there's not too many glues that will stick to plastic and or rubber anymore. So good luck on finding one that will stick. The switch will still work even with the rubber boot cover off. However, be very careful that the plastic faceplate to the switch (not the rubber boot) doesn't come apart and fall off. If it does, the inner spring will fall out and not make the switch work, even if you are able to put the plastic faceplate back on without the spring. If that happens, you can easily still activate the switch and open the hatch by placing a small piece of aluminum foil across the two metal leads inside the switch, which are located on both sides of where the spring was. The actual switch is held in to the hatch handle body by 4 small clips (two on top of the switch, and two on the bottom of the switch), which snaps it into the rear hatch handle body. Use a small screwdriver or thin putty knife to lightly pry it out. Once pride out, it will still be hanging there by the two electrical wires attached to the switch. Don't settle just yet on purchasing the entire rear hatch handle assembly for $150+. I searched around on Fiat sites and found what appears to be a generic replacement switch with the wire connector and attached rubber boot. Although the site says this switch won't fit her 2016 500x, it looks nearly identical with the exception of different coloring on the two wires. The price was cheap, really cheap at $11.81 with free shipping. I just ordered it and will be further working on this in a few days when it arrives.
