Buell S3T Thunderbolt Brake Bulb Size
The Buell S3T Thunderbolt brake bulb uses a P21/5W size for replacement applications. The replacement chart covers vehicle production spanning 1997 to 2002.
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 |
|---|---|
| 2002 | P21/5W |
| 1999-2000 | P21/5W |
| 1997 | P21/5W |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W |