International HX515 Back Up Light Bulb Size

The International HX515 back up light requires a 3157 bulb size for proper installation and function within the specified lighting assembly. Data for the bulb size covers the range from 2017 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
2017-2019	3157

Bulb Specifications

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

Other Locations

Additional Notes

The 3157 is the specified back up light bulb size for the International HX515 across the 2017-2019 model years.
The 3157 bulb follows the ANSI standard, meaning it conforms to a recognized North American specification used in both the United States and Canada.
This bulb is a dual-filament type, which means it contains two separate filaments within a single housing, each operating at a different wattage: 27W for the higher-intensity filament and 7W for the lower-intensity filament.
The 3157 operates at 12 volts, consistent with the standard electrical system voltage found in most commercial vehicles.
The bulb follows the T25 wedge form factor, a designation that refers to its physical housing shape and base style, which determines how it seats and locks into the socket.
Because the 3157 is a dual-filament bulb, substituting it with a single-filament equivalent would result in the loss of one lighting function at that socket position.