Lexus GX460 Courtesy Bulb Size

The Lexus GX460 utilizes a courtesy light component which requires a specific 168 bulb size for proper operation within the lighting system. Available data for the specified vehicle covers a continuous range from 2010 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	US Type	EU Type	Shop
2023	168	W5W	Check Price
2021	168	W5W	Check Price
2010-2019	168	W5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.	W5W	Check Price

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Additional Notes

The 168 is the sole bulb size listed for courtesy lighting across all model years of the Lexus GX460 covered in these specifications, spanning 2010-2023.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated classification system that defines its electrical and physical characteristics.
It belongs to the T10 wedge family, a miniature wedge-base format in which the bulb is held in its socket by the tension of the base itself rather than by a separate locking mechanism or bayonet pins.
The 168 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Its rated wattage of 4.9W places it in the low-power range typical of interior courtesy and map lighting applications, where heat output and current draw are kept minimal.
The T10 wedge format is shared by several ANSI-coded bulbs, including the 194 and 147, which carry different wattage ratings and are not direct substitutes for the 168 despite the physical similarity of their bases.
The 2022 model year is not represented in these specifications, so no bulb size is attributed to it here.