International HX520 Turn Signal Bulb Size

The International HX520 rear turn signal bulb uses a 3157 size replacement bulb. The chart covers 2018 to 2019 production years with corresponding bulb size data.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Rear Turn Signal

Years	Bulb Size
2018-2019	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 rear turn signal bulb for the International HX520 across the 2018-2019 model years.
The 3157 bulb follows the ANSI standard, making it a regulated specification recognized across the United States and Canada.
As a dual-filament bulb, the 3157 operates two separate filaments within a single housing, with the higher-wattage filament (27W) serving the turn signal function and the lower-wattage filament (7W) serving a secondary lighting function such as a running or brake light.
The 3157 is a T25 wedge-type bulb, meaning it uses a plastic wedge base rather than a metal bayonet or screw base for retention in the socket.
The bulb operates on a 12-volt electrical system, consistent with standard automotive DC voltage.
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 position.