Fiat 500 2018 Owner's Manual page 261

SERVICING AND MAINTENANCE 259
Tire Loading And Tire Pressure
NOTE: The proper cold tire inflation pressure is listed on
the driver's side B-Pillar or the rear edge of the driver's
side door.
Check the inflation pressure of each tire, including the
spare tire (if equipped), at least monthly and inflate to the
recommended pressure for your vehicle.
Example Tire Placard Location (B-Pillar)
8
Example Tire Placard Location (Door)