Fiat 2016 500X Owner's Manual page 382

380 IN CASE OF EMERGENCY
License Plate Lights
To replace the bulbs proceed as follows:
1. Using a suitable tool remove the license plate lens.
License Plate Light Location
License Plate Light
2. Remove the bulbs from the individual side contacts.
3. Insert the new bulbs, and ensure that they are properly
locked between the contacts.
4. Reinstall the license plate lens.