Lexus IS350 Brake Bulb Size

The Lexus IS350 Center High Mount Stop Light requires a 194 bulb size for replacement. The chart covers 2023 to 2024 model years with corresponding bulb size data.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Center High Mount Stop Light

Years	US Type	EU Type	Shop
2023-2024	194	W5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.	W5W	Check Price

Other Locations

Additional Notes

The 194 bulb is the specified size for the Center High Mount Stop Light on the Lexus IS350 for the 2023-2024 model years.
The 194 bulb follows the ANSI standard applicable in the US and Canada, classifying it as a miniature wedge type in the T10 form factor.
T10 wedge bulbs use a wedge-shaped base rather than a pin or bayonet connection, allowing the base itself to make electrical contact when pressed into a compatible socket.
The 194 bulb operates at 12 volts with a power draw of 3.78 watts, placing it in the low-wattage range typical of indicator and auxiliary lighting applications.
Because the T10 socket is shared by several bulb variants with differing wattage ratings, substituting a bulb outside the 3.78W specification risks improper brightness output or socket compatibility issues.