Ferrari 348 GTS front and rear side marker bulbs utilize a 158 size bulb configuration for both locations. The replacement chart covers 1993 to 1994 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 Ferrari 348 GTS uses the 158 bulb for both front and rear side marker positions across the 1993-1994 model years.
The 158 is an ANSI-standardized bulb type recognized for use in the United States and Canada.
It belongs to the T10 form factor, which refers to a miniature wedge-base construction. This base type requires no locking twist to install, as the wedge shape itself holds the bulb in place within the socket.
The 158 bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Its rated wattage of 3W places it in the low-power category, typical of side marker applications where continuous illumination is required without significant heat or current draw.
The use of a single bulb size across all four side marker positions on the Ferrari 348 GTS means the front and rear sockets share the same fitment specification, with no positional variation in bulb type.