Freightliner 114SD headlight bulbs use 9003 and 9008 sizes for both high and low beam applications. The replacement chart covers 2012 through 2018 production years 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.
The 9003 bulb is a dual-filament halogen type that operates both high and low beam functions within a single housing, running at 12 volts with a rated output of 60 watts on high beam and 55 watts on low beam.
The 9008 bulb, also known as H13, is likewise a dual-filament halogen bulb sharing the same 60/55-watt output rating as the 9003, though the two types use physically different base configurations and are not interchangeable with one another.
On the Freightliner 114SD, the 2015-2018 model years use the 9003 bulb for both high beam and low beam headlight positions.
The 2012-2014 model years of the 114SD use the 9008 bulb across both the high beam and low beam headlight positions.
Because the 9003 and 9008 bulbs share similar wattage ratings but differ in base design, a bulb from the 2012-2014 fitment group cannot be installed in a 2015-2018 headlight assembly without modification, and vice versa.
The single-bulb design of both the 9003 and 9008 types means that one bulb per headlight assembly serves both beam functions, reducing the total number of bulbs required per vehicle compared to systems that use separate bulbs for each beam.
The transition from the 9008 to the 9003 fitment occurred between the 2014 and 2015 model years of the 114SD, representing a change in headlight assembly design rather than a change in electrical output.