Plymouth Fury I front turn signal bulbs utilize 1034NA, 1157NA, or 1157 sizes, while rear turn signal bulbs use 1157 or 1034 sizes depending on production specifications. The replacement chart covers 1968 through 1974 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 Fury I turn signal specifications cover model years 1968-1974, spanning both front and rear positions across all seven years.
All four bulb types listed across these specifications, the 1034, 1034NA, 1157, and 1157NA, share the same BAY15d bayonet base and the same 12V, 21W/5W dual-filament electrical ratings.
The BAY15d base is a double-contact bayonet fitting with offset pins, a design that prevents incorrect bulb orientation during installation.
The 1034 and 1034NA are each designated as variants of the 1157 and 1157NA respectively, meaning they share the same base type and wattage but differ in physical construction details specific to their ANSI classification.
The "NA" suffix on the 1034NA and 1157NA denotes natural amber glass, meaning the amber color is built into the glass envelope itself rather than produced by a colored lens or coating.
For the Plymouth Fury I, the front turn signal position uses the 1034NA in 1968-1970 and 1974, while 1971-1972 use the 1157 and 1973 uses the 1157NA, reflecting variation across model years in the same position.
The rear turn signal position on the Fury I uses the 1034 for 1968-1970 and transitions to the 1157 for 1971-1974, with no amber-glass variants specified for the rear position in any year.
In 1973, the front position specifies the 1157NA while the rear specifies the plain 1157, meaning the two positions in that year differ specifically in whether an amber glass envelope is present.
Because the 1034 and 1157 families share the BAY15d base and identical wattage ratings, physical fitment between variants is possible, though substituting a non-amber bulb for an NA-designated position would alter the optical output of the lens assembly.
All bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada.