Freightliner FL106 Tail Light Bulb Size

The Freightliner FL106 tail light requires a 1157 bulb size for proper installation and function within the rear lighting assembly. Available data covers the production range from 1994 through 2003 for the specified vehicle components.

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

Bulb Size by Year Range

Years	Bulb Size
1994-2003	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

Other Locations

Additional Notes

The Freightliner FL106 tail light uses the 1157 bulb across all listed model years, spanning 1994-2003.
The 1157 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical parameters shared by all compliant manufacturers.
The 1157 is a dual-filament bulb, which means it contains two separate filaments within a single envelope, allowing it to serve two distinct lighting functions from one unit, typically stop and tail functions.
The bulb operates on a 12-volt electrical system and draws 21 watts on its high-intensity filament and 5 watts on its low-intensity filament, reflecting the differing power demands of stop versus running light operation.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights along the base. This offset prevents incorrect insertion of a single-filament bulb into a socket intended for a dual-filament unit.
Because the BAY15d base is physically keyed by its offset pins, a single-filament bulb with a BAY15s base, where both pins sit at the same height, is not interchangeable with the 1157 even if the outer housing appears similar.