Ferrari 348 Spider Back Up Light Bulb Size

The Ferrari 348 Spider back up light requires 1156 and P21W bulb sizes for the specific lighting components located at the rear of the vehicle. Data for the bulb specifications covers the range from 1993 to 1995.

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

Bulb Size by Year Range

Years	Bulb Size
1993-1995	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The 1156 is the sole bulb type listed for the Ferrari 348 Spider's back up light across the 1993-1995 model years.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail.
It operates at 12 volts and 21 watts, which places it in the standard range for reverse lighting applications in passenger vehicles of that era.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, as opposed to the dual-pin BA15d variant.
The BA15s base type is not interchangeable with BA15d sockets; substituting one for the other is not possible without modification due to the differing pin configurations.
The 1156 designation follows ANSI standards, applicable in both the United States and Canada, indicating a standardized specification rather than a proprietary or regional variant.