Ferrari F355 Spider front and rear side marker bulbs use 194 size bulbs for replacement applications. The replacement chart covers 1996 to 1999 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 194 bulb is the sole bulb type specified for the Ferrari F355 Spider across all side marker positions for the 1996-1999 model years.
The 194 bulb follows the ANSI standard recognized in the United States and Canada, classifying it as a regionally standardized automotive component.
It belongs to the T10 miniature wedge form factor, a base type that requires no locking tabs or twist mechanisms for installation, relying instead on wedge tension within the socket.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles of that era.
Its rated wattage of 3.78W places it in the low-power category, typical of side marker applications where illumination intensity requirements are minimal compared to headlamps or brake lights.
The front and rear side marker positions on the F355 Spider share an identical bulb specification, meaning a single bulb type serves both locations without substitution or adaptation.
The T10 wedge base is a widely produced form factor, and the 194 designation is a standardized ANSI trade number, meaning equivalent bulbs from different manufacturers are generally interchangeable provided they match the 194 specification exactly.
Substituting a bulb with a higher wattage rating than 3.78W risks exceeding the thermal tolerance of the original socket and wiring, even if the physical base fits.