Dodge Aspen front and rear side marker bulbs utilize a 168 bulb size across both positions. The replacement chart covers vehicle production spanning 1976 to 1980.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge Aspen uses the 168 bulb across all front and rear side marker positions for the 1976-1980 model years.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, classifying it as a regulated miniature lamp type.
It belongs to the T10 wedge family, a form factor defined by a wedge-shaped base that seats directly into a socket without a separate metal base or pins.
The T10 designation refers to the bulb's tubular envelope, with the numeric portion indicating a width of 10 eighths of an inch across the glass.
Operating voltage is rated at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this era.
Power consumption is rated at 4.9 watts, placing the 168 in the low-wattage category typical of side marker and courtesy lighting applications.
Because the 168 bulb serves both the front and rear side marker positions on the Dodge Aspen, a single bulb type covers all four side marker sockets on the vehicle.
The wedge base design of the T10 means fitment depends on socket compatibility with that specific base type, and sockets designed for bayonet or indexed-pin bases are not interchangeable with it.