Lexus IS500 Interior Door Bulb Size

The Lexus IS500 interior door utilizes a 168 bulb size for illumination purposes within the cabin area. Data for the specific component covers the period from 2022 through 2023.

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
2022-2023	168

Bulb Specifications

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

Other Locations

Additional Notes

The T10 miniature wedge bulb, designated under ANSI standard 168, is the interior door bulb size for the Lexus IS500 across the 2022-2023 model years.
The 168 bulb operates at 12 volts with a rated power draw of 4.9 watts, placing it in the low-wattage range typical of interior courtesy and door lighting applications.
The T10 designation refers to the bulb's tubular envelope shape, with the wedge base design meaning the bulb is held in its socket by the tension of the base itself rather than by a separate locking mechanism.
The 168 specification is recognized under ANSI standards applicable in both the United States and Canada, reflecting a standardized fitment shared across a wide range of vehicle manufacturers and applications.
The wedge base format of the 168 bulb means it is directly interchangeable with other T10 wedge bulbs of the same voltage and wattage rating, though substitutions outside the 12V/4.9W specification may affect circuit compatibility.