Hino 238 Turn Signal Bulb Size

The Hino 238 front turn signal bulb uses a 4157NA size bulb for this commercial vehicle model. The replacement chart covers vehicle production spanning 2005 to 2012 with corresponding bulb size specifications.

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

Front Turn Signal

Years	Bulb Size
2005-2012	4157NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.	4157NA

Other Locations

Additional Notes

The 4157NA is the sole bulb type specified for the front turn signal position on the Hino 238, appearing across all listed model years from 2005-2012.
The 4157NA is a dual-filament bulb rated at 12 volts, with filaments drawing 27 watts and 7 watts respectively, making it suitable for combined stop/turn or running light functions within a single housing.
The bulb follows the T25 wedge form factor, which refers to a wedge-base design that seats directly into a socket without a separate metal base or bayonet pins.
The "NA" suffix in the 4157NA designation indicates natural amber glass, meaning the amber color is built into the bulb envelope itself rather than produced by a colored lens or coating.
The 4157NA carries ANSI standardization recognized in both the United States and Canada, placing it within a regulated specification framework for electrical and photometric performance.
Because the amber tint is integral to the 4157NA glass, substituting a clear-glass equivalent such as the 4157 would alter the color output of the front turn signal on the Hino 238 and may not meet regulatory requirements for amber turn signal illumination.