International TerraStar Back Up Light Bulb Size

The International TerraStar back up light utilizes a single 1156 bulb size for illumination across all listed vehicle configurations within the provided technical data set. Information provided covers a specific production range starting in 2010 and ending in 2018.

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
2010-2018	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The International TerraStar uses the 1156 bulb for its back up light across the 2010-2018 model years.
The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical characteristics conform to a defined North American specification recognized in both the United States and Canada.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive incandescent back up light applications.
The 1156 is a single-filament bulb, meaning it serves only one lighting function, as opposed to dual-filament types that handle two functions such as braking and running light within a single housing.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a bayonet-style mount with a 15mm collar and a single contact pin, which determines physical fitment into the socket.
The BA15s single-pin base of the 1156 is not interchangeable with the BA15d base found on dual-filament bulbs such as the 1157, despite the two types sharing a similar overall form factor.