Buick Encore Courtesy Bulb Size

The Buick Encore courtesy light utilizes bulb sizes 194 and 12961 for interior illumination across various trim levels. Available data for the specified lighting components covers the period from 2013 through 2021.

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	194
2017-2019	12961 (Trunk Light)
2013-2016	12961

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The 12961 is a Philips part number designating a miniature wedge bulb with a T10 form factor, a W2.1x9.5d base, and ratings of 12V and 5W. It serves as the courtesy bulb across the Buick Encore from 2013 through 2016, and specifically as the trunk light for the 2017-2019 model years.
The 194 is an ANSI-standardized bulb used in the United States and Canada. It shares the T10 miniature wedge form factor with the 12961 but operates at a lower wattage of 3.78W versus 5W. The 2021 Buick Encore uses the 194 for its courtesy lighting.
Both the 194 and the 12961 occupy the T10 miniature wedge category, yet they carry different wattage ratings and originate from different standardization systems, one being an ANSI designation and the other a manufacturer part number. This distinction is relevant to fitment, as wattage differences can affect socket compatibility and light output even when the physical form factor is shared.
The 12961 is labeled specifically as a trunk light bulb for the 2017-2019 Encore, indicating a positional distinction within the courtesy lighting system for those years that is not noted for earlier model years using the same bulb number.