The Freightliner XB Line uses 1893 bulb size for both front and rear side marker applications. The replacement chart covers vehicle production years spanning 1995 to 1997.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1893 bulb is the designated size for both the front and rear side marker positions across all listed model years of the Freightliner XB Line, covering 1995-1997.
The 1893 is classified as a T5 miniature wedge bulb, a form factor defined by a tubular glass envelope approximately 5/8 of an inch wide with a wedge-style base that seats directly into a socket without a separate metal cap.
The 1893 operates at 12 volts and draws 2 watts, placing it among the lower-output bulbs in automotive applications, consistent with its role as a marker rather than a primary illumination source.
The 1893 carries ANSI standardization recognized in both the United States and Canada, meaning the bulb conforms to a shared North American specification for physical and electrical characteristics.
Because the front and rear side marker positions on the Freightliner XB Line share the same 1893 bulb size, a single bulb type serves both locations across the 1995-1997 model years.
The wedge base of the 1893 relies on the tension of its wire leads against the socket walls to maintain contact, a design that differs from bayonet or screw-base bulbs and requires socket compatibility specific to the wedge format.