Ferrari 348 TB Map Light Bulb Size

The Ferrari 348 TB map light requires a bulb size of 168 for the interior lighting system. Data for the specific component covers the range from 1990 to 1992.

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
1990-1992	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Ferrari 348 TB uses the 168 bulb size for its map light across the 1990-1992 model years.
The 168 bulb is an ANSI-standardized type, meaning it conforms to a defined North American specification used across many vehicle manufacturers, which can affect cross-compatibility with other vehicles using the same standard.
It belongs to the T10 miniature wedge form factor, a base style that relies on two angled legs pressed into a socket rather than a threaded or bayonet-style mount.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this era.
At 4.9 watts, the 168 is a low-wattage bulb, which is typical for interior courtesy and map lighting applications where prolonged use and low heat output are practical considerations.
The T10 wedge base is a widely produced form factor, and the 168 designation specifically identifies the wattage and voltage rating within that family, meaning not all T10 bulbs are interchangeable with the 168 despite sharing the same base type.