Lexus IS300 Courtesy Bulb Size

The Lexus IS300 courtesy light utilizes bulb size 168 and bulb size 13050 for the interior lighting system. Available data for the specified components covers the period from 2001 to 2024.

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
2021-2024	168
2016-2019	168
2001	13050

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
OEM/Wagner part number. Halogen bulb, specialty application. 12V.	13050

Other Locations

Additional Notes

The 168 bulb is the courtesy bulb size used across the Lexus IS300 for model years 2016-2019 and 2021-2024.
The 168 bulb follows the ANSI standard recognized in the United States and Canada, and it belongs to the T10 miniature wedge family, operating at 12 volts with a rated power draw of 4.9 watts.
The T10 wedge base design means the 168 bulb is held in place by friction rather than a locking bayonet or screw mechanism, which is typical for courtesy and interior lighting positions.
The 2001 Lexus IS300 uses a 13050 bulb for the courtesy application, which is an OEM and Wagner part number designation rather than an ANSI industry-standard code.
The 13050 is classified as a halogen bulb for a specialty application, also rated at 12 volts, and its part number format indicates it is sourced through manufacturer-specific or aftermarket cataloging rather than a universal bulb standard.
Because the 168 and 13050 carry different designations and are described under separate technical categories, the two bulb types are not interchangeable between the 2001 model year and the 2016-2024 model years.