Fiat 124 Spider Fog Light Bulb Size

Fiat 124 Spider front fog light uses an H11 bulb size for replacement. The chart covers 2017 to 2020 production years with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Fog Light

Years	Bulb Size
2017-2020	H11

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament halogen bulb with PGJ19-2 base. Also approved in the US. 12V, 55W.	H11

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Additional Notes

The Fiat 124 Spider uses the H11 bulb for its front fog lights across the 2017-2020 model years.
The H11 is a single-filament halogen bulb, meaning it serves one lighting function only and does not combine multiple roles such as low and high beam within the same unit.
The H11 operates at 12 volts and 55 watts, which are standard electrical values for halogen fog light applications in passenger vehicles.
The H11 uses a PGJ19-2 base, a keyed connector design that physically prevents incorrect bulb installation in compatible housings.
The H11 is rated under ECE standards, the regulatory framework used across Europe and much of the world, and also carries approval for use in the United States.
Because the H11 is a single-filament bulb, a failure results in complete loss of the fog light function rather than a partial reduction in output.
The PGJ19-2 base of the H11 is not interchangeable with other common halogen bases such as H7 or H4, and substitution with physically similar bulbs risks improper fitment or electrical incompatibility.