Toyota GR Corolla Courtesy Bulb Size

The Toyota GR Corolla courtesy light utilizes a 194 bulb size for the specific lighting component located inside the vehicle doors. Data for the bulb size covers the 2023 to 2024 range.

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
2023-2024	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

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Additional Notes

The 194 bulb is the specified courtesy bulb size for the Toyota GR Corolla across the 2023-2024 model years.
The 194 designation follows the ANSI standard used in the United States and Canada, making it a regionally standardized part number rather than a proprietary specification.
This bulb uses a T10 miniature wedge base, a baseless design where the glass envelope itself is shaped to friction-fit directly into the socket without a separate metal base.
The 194 operates at 12 volts and draws 3.78 watts, placing it among the lower-wattage bulbs found in automotive interior applications.
The T10 wedge format is widely shared across many vehicle makes and models, though fitment into a specific socket depends on the physical space and retention design of that socket.