Buick Encore GX Courtesy Bulb Size

The Buick Encore GX courtesy light uses bulb size 194 or 12961 depending on the specific configuration of the lighting assembly. Data for the bulb sizes covers the range from 2020 through 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

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
2024	194	W5W	Check Price
2023	12961	12961	Check Price
2021	12961	12961	Check Price
2020	12961 (Except Roof Sun, Glass, Sliding, Elec, Transparent Glass Fixed)	12961	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
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961	Check Price

Other Locations

Additional Notes

The 194 and 12961 bulbs share the same T10 miniature wedge form factor, but they differ in wattage. The 194 operates at 3.78W, while the 12961 operates at 5W, making them electrically distinct despite their physical similarities.
The 194 is an ANSI-standardized bulb used across the United States and Canada, whereas the 12961 is a Philips part number designation. Both operate at 12V and fit the T10 wedge socket.
The 12961 specifies a W2.1x9.5d base, which is the standard wedge base type for T10 bulbs. This base type is defined by a 9.5mm pin spacing and a 2.1mm wire width.
The Buick Encore GX uses the 194 bulb for the 2024 model year courtesy application, while the 2020-2023 model years use the 12961 bulb for the same application.
The 2020 Buick Encore GX courtesy bulb fitment carries a noted exception: vehicles equipped with a Roof Sun, Glass, Sliding, Elec, or Transparent Glass Fixed configuration are excluded from the 12961 specification.