Harley-Davidson XL1200T SuperLow 1200T Brake Bulb Size

Harley-Davidson XL1200T SuperLow 1200T uses a 3157 bulb size for brake applications. The replacement chart covers 2014 to 2017 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
2014-2017	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 XL1200T SuperLow 1200T uses the 3157 bulb for brake lighting across the 2014-2017 model years.
The 3157 is an ANSI-standardized bulb type recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across many vehicle applications.
This bulb follows the T25 wedge form factor, which describes its tubular glass envelope and the wedge-style base that seats directly into a socket without a separate metal cap or pins.
The 3157 operates on a 12-volt circuit, consistent with the standard electrical system voltage found in most production motorcycles and automobiles.
Its dual-filament design provides two distinct wattage outputs: 27W for the higher-intensity brake or turn function and 7W for the lower-intensity running light function, both within a single bulb housing.
Because the 3157 is a dual-filament type, substituting it with a single-filament bulb of similar appearance would result in the loss of one lighting function, making filament count a critical factor in replacement compatibility.