Buick Encore Brake Bulb Size

The Buick Encore brake light utilizes a 7443 bulb size for illumination across all listed vehicle configurations within the provided technical data set. Information regarding the specific lighting components covers a time range spanning from 2013 through 2020.

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
2019-2020	7443	W21/5W	Check Price
2013-2016	7443	W21/5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament wedge bulb (T20). 12V, 21W/5W.	7443	Check Price

Other Locations

Additional Notes

The 7443 is the brake bulb size across all specified model years of the Buick Encore, covering 2013-2016 and 2019-2020.
The 7443 follows the ANSI standard, which is the recognized bulb classification system used in the United States and Canada.
This bulb belongs to the T20 wedge family, a form factor defined by its wedge-shaped base that connects directly into a matching socket without a separate metal cap or bayonet pins.
The 7443 is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, allowing it to serve both brake and tail light functions from one unit.
The two filaments operate at different wattages: 21W for the higher-intensity brake function and 5W for the lower-intensity running or tail light function.
The bulb operates at 12V, consistent with the standard electrical system voltage found in passenger vehicles.
The 7443 is sometimes confused with the 7440, which is a single-filament variant in the same T20 wedge family. The two are not interchangeable in dual-filament applications such as the brake circuit on the Encore.