International 5500i Back Up Light Bulb Size

The International 5500i back up light requires a bulb size of 1156 for proper installation and function. Data for the specified component covers the range from 2011 to 2014.

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
2011-2014	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 5500i uses the 1156 bulb for the back up light across the 2011-2014 model years.
The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard shared across the United States and Canada.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard incandescent automotive backup light applications.
The 1156 is a single-filament bulb, meaning it serves one lighting function only, as opposed to dual-filament types that can handle two functions such as braking and running lights simultaneously.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a bayonet mount with a 15mm collar and a single contact pin, which physically distinguishes it from visually similar bulbs that use different base configurations.
The BA15s single-contact base of the 1156 is not interchangeable with the BA15d double-contact base found on dual-filament bulbs such as the 1157, despite both sharing the same 15mm bayonet collar size.