Lexus SC400 License Plate Bulb Size

The Lexus SC400 license plate component requires a 168 bulb size for proper illumination of the rear vehicle identification area. Available information covers the production span from 1992 through 2000 for the specified lighting equipment.

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
1992-2000	168

Bulb Specifications

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

Other Locations

Additional Notes

The 168 bulb is the specified license plate bulb size for the Lexus SC400 across all model years listed in the specifications, spanning 1992-2000.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated and widely adopted specification framework.
It is a T10 miniature wedge-base bulb, meaning it uses a wedge-style base rather than a bayonet or screw fitting, which requires a compatible wedge socket for proper installation.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
At 4.9 watts, the 168 is a low-wattage bulb, which is typical for license plate lighting applications where illumination requirements are modest.
The T10 designation refers to the bulb's tubular envelope size, with the number indicating a width of 10 eighths of an inch, a common sizing convention in the ANSI miniature bulb classification system.
Because the 168 is an ANSI-standardized type, it is produced by multiple manufacturers and is broadly available as a direct-fit replacement for the SC400's license plate housing.
The wedge base design of the 168 means the bulb is held in place by the socket's contact tension alone, with no separate locking mechanism or base pin required.