Harley-Davidson XR1200 Brake Bulb Size

The Harley-Davidson XR1200 uses a 3157 bulb size for brake applications. The replacement chart covers 2009 to 2012 vehicle production years with corresponding bulb specifications.

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
2009-2012	3157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157

Other Locations

Additional Notes

The Harley-Davidson XR1200 uses the 3157 bulb for the brake light across the 2009-2012 model years.
The 3157 is an ANSI-standardized bulb type, meaning its specifications are governed by a formal industry standard applicable in the United States and Canada.
This bulb follows the T25 wedge form factor, which refers to its tapered, wedge-shaped base that seats directly into a compatible socket without a separate metal base or bayonet pins.
The 3157 operates on a 12-volt electrical system, consistent with the standard automotive and motorcycle electrical architecture.
Its dual-filament design carries two separate wattage ratings: 27W for the high-intensity brake or stop function and 7W for the lower-intensity running or tail-light function.
Because the 3157 is a dual-filament bulb, substituting it with a single-filament equivalent would result in the loss of one lighting function, making filament count a critical factor in replacement selection.