Plymouth Volare front turn signal bulbs utilize 1157NA or 1034NA sizes, while rear turn signal bulbs use 1157 size. The replacement chart covers 1976 to 1980 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Volare uses three bulb types across its front and rear turn signal positions: the 1157NA, 1034NA, and 1157, all of which are dual-filament bulbs operating at 12V with a 21W/5W power rating.
All three bulb types share the BAY15d bayonet base, a double-contact offset-pin base standard that physically locks the bulb into the socket at a fixed rotational position.
The 1157 is the sole bulb type used in the rear turn signal position across all model years from 1976-1980, indicating a consistent rear fitment throughout the Volare's production run.
The front turn signal position alternates between the 1157NA and 1034NA across model years, with 1157NA fitted in 1976, 1978, and 1980, while 1034NA is specified for 1977 and 1979.
The 1034NA is described as a variant of the 1157, sharing the same voltage, wattage, base type, and natural amber glass construction, though the two carry distinct ANSI designations and are not listed as interchangeable in these specifications.
The "NA" suffix on the 1157NA and 1034NA denotes natural amber glass, meaning the amber color is built into the glass envelope itself rather than produced by an external lens or coating.
The 1157, without the NA suffix, has a clear glass envelope, making its amber signal output dependent on the vehicle's lens rather than the bulb itself.
Because the front turn signal alternates between 1157NA and 1034NA depending on the model year, substituting one for the other without confirming the correct year specification carries a fitment risk despite their shared base type.