Dodge Ram 2500 License Plate Bulb Size

The Dodge Ram 2500 license plate light uses bulb sizes 194 and 168 according to the provided technical data for the exterior lighting components. Information covers the range from 1994 through 2010 for the specified vehicle and lighting application.

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
2010	194
1994-2009	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Dodge Ram 2500 uses two bulb sizes for the license plate position across its model years: the 194 and the 168. Both are T10 miniature wedge bulbs operating at 12 volts, and both carry ANSI standardization recognized in the United States and Canada.
The 168 bulb is rated at 4.9 watts, while the 194 is rated at 3.78 watts. Although the two bulbs share the same T10 wedge form factor, their wattage difference means they are not electrically identical.
The Dodge Ram 2500 used the 168 bulb for the license plate position across the 1994-2009 model years.
The 2010 Dodge Ram 2500 uses the 194 bulb for the license plate position, which differs from the 168 bulb specified for all prior model years in these records.
The T10 wedge base is a common miniature bulb format in which the glass envelope itself acts as the connector, with no separate metal base pins. This design allows for tool-free removal in most license plate housings.
The wattage difference between the 168 and 194 bulbs is approximately 1.12 watts. Substituting one for the other in a socket designed for a specific wattage rating may affect circuit load, even though the physical fit is the same.