Buick Regal Sportback Tail Light Bulb Size
The Buick Regal Sportback tail light requires a PY21W bulb size for proper installation and function within the rear lighting assembly. Data for the specified component covers the range from 2018 to 2019.
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 |
|---|---|
| 2018-2019 | PY21W (Outer) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W. | PY21W |