Fiat 124 Spider high beam headlight bulbs use 9005 size while low beam headlight bulbs use H11 size. The replacement chart covers 2017 to 2020 vehicle 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.
The Fiat 124 Spider used two distinct bulb types across its headlight system for the 2017-2020 model years: the 9005 for high beam and the H11 for low beam, both exclusively in halogen capsule headlamp configurations.
The 9005 bulb follows the ANSI standard used in the United States and Canada. It is a single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base.
The H11 bulb follows the ECE standard, which governs lighting regulations across Europe and much of the world, though it also carries approval for use in the United States. It is a single-filament halogen bulb rated at 12V and 55W, fitted with a PGJ19-2 base.
The 9005 and H11 bulbs operate on the same 12V supply but differ in wattage, with the 9005 drawing 65W and the H11 drawing 55W. This difference reflects their respective roles, as high beam applications typically require greater light output than low beam.
The 9005 and H11 bulbs use physically different bases, the P20d and PGJ19-2 respectively, making them non-interchangeable with each other despite sharing the same operating voltage.
Both bulb positions on the Fiat 124 Spider are specified with the qualifier "With Halogen Capsule Headlamps," indicating that the 9005 and H11 sizes apply specifically to that headlamp variant.