Lexus GS300 License Plate Bulb Size

The Lexus GS300 license plate light uses 168 and 194 bulb sizes for illumination. Available information covers the time range from 1993 through 2005 for the specified vehicle.

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
2005	194
1993-2004	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 168 bulb is the license plate bulb size for the Lexus GS300 across the 1993-2004 model years, making it the predominant fitment across this generation.
The 194 bulb applies exclusively to the 2005 GS300, representing a departure from the 168 specification used in all prior model years.
Both the 168 and 194 are ANSI-standardized miniature wedge bulbs of the T10 form factor, operating on a 12-volt circuit.
Although the 168 and 194 share the same T10 wedge base and voltage rating, they are not identical in power draw. The 168 is rated at 4.9 watts, while the 194 draws 3.78 watts.
The wattage difference between the two bulbs means that substituting a 168 in a 2005 GS300 socket, or a 194 in a 1993-2004 socket, introduces a mismatch in the intended power draw for that circuit.