Freightliner 114SD Side Marker Bulb Size

Freightliner 114SD front side marker bulb uses a 3157NA size. The replacement chart covers 2012 to 2018 vehicle production years with bulb specifications.

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

Front Side Marker

Years	Bulb Size
2012-2018	3157NA

Bulb Specifications

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

Other Locations

Additional Notes

The Freightliner 114SD uses the 3157NA bulb for the front side marker position across the 2012-2018 model years.
The 3157NA 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.
This bulb is a dual-filament type, operating at 27 watts on the high filament and 7 watts on the low filament, which allows it to serve two distinct lighting functions within a single housing.
The 3157NA carries a T25 wedge base, a form factor that seats directly into a socket without a separate bayonet or screw mechanism.
The "NA" suffix in the 3157NA designation indicates natural amber glass, meaning the color is produced by the glass envelope itself rather than by a colored lens or coating on the housing.
The bulb operates on a 12-volt electrical system, consistent with standard North American commercial vehicle architecture.
The 3157 family includes several variants distinguished by suffixes, and substituting a non-NA variant would alter the amber output at the front side marker position since those versions use clear glass.