Buick Regal TourX Brake Bulb Size
The Buick Regal TourX brake light utilizes 921 and 7440 bulb sizes for the lighting system. Data for the specific components 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 | 921 (Inner) |
| 7440 (Outer) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W. | 921 |
| ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W. | 7440 |