International WorkStar 7700 Turn Signal Bulb Size

International WorkStar 7700 front turn signal bulbs utilize 3157NA size while rear turn signal bulbs use 3157 size. The replacement chart covers 2008 through 2012 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.

Front Turn Signal

YearsBulb Size
2008-20123157NA

Rear Turn Signal

YearsBulb Size
2008-20123157

Bulb Specifications

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

Other Locations

Additional Notes