Plymouth Valiant front and rear side marker bulbs utilized 168, 194, or 1895 size bulbs depending on production specifications. The replacement chart covers 1968 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 Valiant uses three distinct bulb sizes across its side marker positions: the 168, 194, and 1895, all of which conform to ANSI standards recognized in both the United States and Canada.
All three bulb types are miniature wedge-base designs, meaning they use a wedge-shaped plastic base rather than a metal bayonet or screw base, and are retained by friction within the socket.
The 168 and 194 bulbs share the same T10 wedge form factor, which refers to a tubular envelope roughly 10 eighths of an inch wide. Despite this physical similarity, the two bulbs differ in wattage and are not rated identically.
The 1895 bulb uses a T5 wedge form factor, which is a narrower tubular envelope than the T10. This makes it physically incompatible with sockets designed for the 168 or 194, even though all three operate on 12 volts.
The 168 bulb is rated at 4.9 watts, making it the highest-wattage option among the three types listed for the Plymouth Valiant's side marker positions.
The 194 bulb is rated at 3.78 watts, placing it between the 168 and the 1895 in terms of power consumption. Although it shares the T10 form factor with the 168, substituting one for the other would result in a wattage mismatch.
The 1895 bulb draws only 0.9 watts, the lowest of the three types. Its T5 envelope is noticeably smaller than the T10 used by the 168 and 194.
For the Plymouth Valiant, the front and rear side marker positions use identical bulb sizes within each model year, meaning the same bulb type applies to both locations on a given vehicle.
The 1895 bulb was specified for both front and rear side markers on the 1968-1970 Valiant, while the 194 was specified for 1971-1972 models, and the 168 for 1973-1976 models.
Because the 168 and 194 share a T10 base, physical fitment in the socket may be possible between the two, but the wattage difference means one is not a rated equivalent of the other.