Freightliner FL112 front and rear turn signal bulbs utilize a 1157 size across both locations. The replacement chart covers vehicle production spanning 1996 to 2003.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Freightliner FL112 uses the 1157 bulb for both front and rear turn signals across all listed model years, spanning 1996-2003.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, allowing it to serve two distinct lighting functions at different wattages.
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, which corresponds to its turn signal and parking light roles respectively.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The 1157 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across manufacturers.
Because the front and rear turn signal positions on the FL112 share the same bulb type, a single replacement part covers both locations across the entire 1996-2003 model range.
The BAY15d base is not interchangeable with single-pin bayonet bases such as the BA15s, so substituting a single-filament bulb with a BA15s base would result in an incompatible fit even if the glass envelope appeared similar in size.