Plymouth Duster front and rear side marker bulbs utilized 168, 194, or 1895 bulb sizes depending on production specifications. The replacement chart covers 1970 through 1976 model years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Duster side marker bulb specifications cover the 1970-1976 model years, with three distinct bulb types used across that span: the 168, 194, and 1895.
All three bulb types listed are ANSI-standardized miniature wedge bulbs rated at 12 volts, making them compatible with the standard 12V electrical systems found in domestic passenger vehicles of that era.
The 168 bulb is a T10 miniature wedge type rated at 4.9 watts. It serves as both the front and rear side marker bulb for the 1973-1976 Duster.
The 194 bulb is also a T10 miniature wedge type, but carries a lower wattage rating of 3.78 watts. It is specified for both front and rear side marker positions on the 1971-1972 Duster.
Although the 168 and 194 share the same T10 wedge base form factor, their wattage ratings differ, which means they are not electrically identical despite their physical interchangeability at the socket level.
The 1970 Plymouth Duster uses the 1895 bulb for both front and rear side markers. This is a T5 miniature wedge type rated at just 0.9 watts, making it the lowest-wattage bulb in the specification set.
The T5 base of the 1895 is physically smaller than the T10 base used by the 168 and 194, meaning the 1895 is not a drop-in socket replacement for the bulbs used in the 1971-1976 model years.
The front and rear side marker positions share identical bulb specifications for every model year listed, indicating no asymmetry between front and rear lighting requirements across the Duster's production run in this specification set.