Dodge St. Regis License Plate Bulb Size

The Dodge St. Regis license plate bulb uses a 168 size bulb for this model. The replacement chart covers vehicle production years spanning 1979 to 1981.

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
1979-1981	168

Bulb Specifications

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

Other Locations

Additional Notes

The 1979-1981 Dodge St. Regis uses the 168 bulb for the license plate position across all three model years.
The 168 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across those markets.
It is a miniature wedge-type bulb, classified under the T10 form factor. The wedge base design means the bulb is held in place by the socket gripping its glass base directly, with no separate metal base or pins involved.
The 168 operates at 12 volts and draws 4.9 watts, placing it in the low-wattage range typical of illumination bulbs used for license plates rather than signaling or lighting functions.
Because the 168 shares the T10 wedge form factor with several other bulb numbers in the same family, substitution is possible in some cases, though voltage and wattage ratings of any replacement should match the original specification to avoid electrical or fitment issues.