The Ferrari 348 Spider front and rear turn signal bulbs both require a 1156 size bulb for proper operation. The replacement chart covers 1993 to 1995 model 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 Ferrari 348 Spider uses the 1156 bulb for both its front and rear turn signals across the 1993-1995 model years.
The 1156 is a single-filament bulb, meaning it is dedicated to one lighting function rather than serving dual purposes such as combined stop and tail operation.
It operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive incandescent turn signal applications.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d base found on some other bulb types.
Because the front and rear turn signal positions share the same 1156 specification on the 348 Spider, a single bulb type serves all four turn signal housings on the vehicle.
The 1156 is classified under the ANSI standard and is rated for use in the United States and Canada, reflecting a standardized North American automotive bulb designation.
The BA15s bayonet base requires an alignment-independent insertion, as the single-pin design allows the bulb to be seated in any rotational position, unlike indexed bases that require specific orientation.
Substituting a dual-filament bulb such as the 1157, which shares a similar physical form but uses a BA15d base with two pins, would not be compatible with the single-contact socket specified for the 348 Spider.