The Oldsmobile Dynamic 88 front turn signal bulb accommodates 3 distinct sizes including 1034NA, 1157, and 1034, while the rear turn signal bulb size options consist of 1157 and 1034. The replacement chart covers vehicle production years spanning 1958 to 1966.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1034 bulb is the most frequently specified type across the Oldsmobile Dynamic 88 turn signal positions, appearing in both front and rear applications for the 1958-1963 model years.
All three bulb types used in the Dynamic 88 turn signal system, the 1034, 1034NA, and 1157, share the BAY15d bayonet base, a dual-contact offset-pin fitting that physically distinguishes it from single-filament bases.
Each of the three bulb types operates on a 12-volt system with a dual-filament configuration rated at 21W for the high-intensity filament and 5W for the low-intensity filament, allowing a single bulb to serve both signaling and parking light functions.
The 1034NA, specified for the 1966 front turn signal position, is a variant of the 1157 with natural amber-tinted glass, which produces an amber output without relying on a colored lens.
The 1034 is also a variant of the 1157, sharing the same BAY15d base and 12V/21W/5W ratings, though it is treated as a distinct ANSI designation in these specifications.
Because the 1034, 1034NA, and 1157 are all variants sharing the BAY15d base and identical voltage and wattage ratings, physical fitment across these types is compatible, though the amber glass of the 1034NA makes it application-specific where lens color is a factor.
The 1966 Oldsmobile Dynamic 88 is the only model year in these specifications where the front and rear turn signal positions call for different bulb types, with the 1034NA at the front and the 1157 at the rear.
For the 1964-1965 model years, both the front and rear turn signal positions on the Dynamic 88 use the 1157, making those years the only ones with a fully uniform bulb specification across both positions.