Ford Probe License Plate Bulb Size

The Ford Probe license plate light requires a 168 bulb size for proper illumination of the rear registration area. Available data covers the production span from 1989 to 1997.

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
1989-1997	168

Bulb Specifications

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

Other Locations

Additional Notes

The Ford Probe uses the 168 bulb for its license plate position across all listed model years, spanning 1989-1997.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated specification framework common to North American automotive applications.
This bulb belongs to the T10 form factor, which describes a miniature wedge-base design. The wedge base means the glass envelope itself acts as the retention mechanism, with no separate metal base or pins required for socket fitment.
The 168 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this era.
At 4.9 watts, the 168 draws a low level of power, which is typical for license plate illumination, a position that requires only enough output to meet visibility regulations rather than functional lighting demands.
The T10 wedge base is a widely used form factor, and the 168 shares this base type with several other bulb numbers in the same family, such as the 194 and 158. However, wattage and filament ratings differ between these variants, and substitution without confirming electrical compatibility is not advisable.