Fiat 500X Fog Light Bulb Size

Additional Notes

• The H11 bulb is the more frequently specified front fog light bulb for the Fiat 500X, appearing across the 2019-2022 model years, while the H8 bulb covers 2016-2018, 2023, and one variant of 2019.
• Both the H8 and H11 are single-filament halogen bulbs operating on a 12-volt electrical system, making them standard low-power fog light options rather than high-intensity or dual-filament types.
• The H8 operates at 35 watts, whereas the H11 draws 55 watts, a difference of 20 watts that reflects a meaningfully higher power draw for the H11 despite both bulbs sharing the same voltage rating.
• The H8 uses a PGJ19-1 base and the H11 uses a PGJ19-2 base. These two base types are physically distinct and not interchangeable, meaning an H11 bulb cannot be seated in a socket designed for an H8, and vice versa.
• Both bulb types conform to ECE standards, which govern lighting equipment across Europe and much of the world, and both also carry approval for use in the United States.
• The 2019 Fiat 500X is the only model year in these specifications that lists both H8 and H11 as front fog light bulb sizes, indicating that two separate configurations existed within that single model year.
• Because the 2019 model year carries two distinct bulb sizes, confirming the specific vehicle configuration is necessary before selecting a replacement bulb, as installing the wrong base type will result in an incompatible fit.
• The transition from H8 in 2018 to H11 in 2019-2022, and then back to H8 in 2023, reflects non-linear bulb specification changes across the production run of the Fiat 500X.