Unreasonably proud of self for successfully changing the brake lamp bulb on my FIAT 500 (with some help from Peter and Paul):

Fiat 500 rear light assembly

Turns out the whole rear light assembly comes right off after loosening two screws in the trunk area, then four more screws pop out the bulb mount, and the running/brake light is a double-filament bulb, C$6.49 for a 2-pack at Canadian Tire. (Good thing it was a 2-pack because the first bulb’s running light filament burned out instantly on activation and I had to pull the whole assembly back out and install the second bulb, which worked fine.)