Buick Encore Tail Light Bulb Size

The Buick Encore tail light requires a 7443 bulb size for proper installation and function within the rear lighting assembly. Data for the specified component covers the time range 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 tail light bulb size for the Buick Encore across the 2013-2016 and 2019-2020 model years.
The 7443 bulb follows the ANSI standard, which is the recognized specification framework used in the United States and Canada for automotive lighting components.
This bulb belongs to the T20 wedge family, a form factor defined by its wedge-shaped base that seats directly into a matching socket without a separate metal cap or pins.
The 7443 is a dual-filament bulb, meaning it contains two separate filaments within a single housing, allowing it to serve both tail light and brake light functions from one unit.
The two filaments operate at different wattages: 21W for the higher-intensity brake light function and 5W for the lower-intensity running light function, both at 12 volts.
Because the 7443 is dual-filament, it is not directly interchangeable with single-filament bulbs in the same T20 size family, such as the 7440, which carries only one filament and would not support both lighting functions.