The Oldsmobile Vista Cruiser front turn signal bulb accommodates 3 sizes: 1157NA, 1034NA, and 1157, while the rear turn signal bulb uses 1157 size. The replacement chart covers 1964 through 1975 vehicle production 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 Oldsmobile Vista Cruiser uses three bulb types across its front and rear turn signal positions: the 1157, the 1157NA, and the 1034NA.
All three bulb types share the BAY15d bayonet base and operate at 12V with a dual-filament configuration rated at 21W and 5W, where the higher wattage filament serves the turn signal function and the lower wattage filament serves a secondary running light function.
The 1157NA and 1034NA carry the "NA" suffix, which denotes natural amber glass, meaning the color is built into the bulb itself rather than produced by a colored lens.
The 1034NA is a variant of the 1157 family and shares the same BAY15d base and 12V/21W/5W electrical ratings, though it is a distinct ANSI part number and is not a direct drop-in substitute for the 1157 or 1157NA without confirming socket and housing compatibility.
The rear turn signal position on the Oldsmobile Vista Cruiser uses the 1157 across all model years from 1964-1975, with no variation throughout the entire production span covered by these specifications.
The front turn signal position shows more variation, with the 1157NA specified for 1972-1975, the 1034NA specified for 1967-1968 and 1971, and the standard 1157 specified for 1964-1966.
The shift from the clear-glass 1157 to the amber-glass 1157NA at the front position between 1966 and 1969 reflects a transition to bulbs that produce amber light independently of the lens, a change associated with evolving federal motor vehicle safety standards during that period.
Because the 1157 and 1157NA share identical base type and wattage ratings, physical installation is possible in either direction, but substituting a clear 1157 for an amber-specified 1157NA position may affect the color output of the turn signal if the housing lens is also clear.
The 1034NA, while electrically similar to the 1157NA, has a distinct ANSI designation indicating a difference in filament construction or light output characteristics, and the two are not universally interchangeable despite sharing the same base.