The Oldsmobile Dynamic 88 uses an H5001 bulb size for high beam headlights and an H5006 bulb size for low beam headlights. The replacement chart covers vehicle production years spanning 1958 to 1966 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 Dynamic 88 uses the H5001 for high beam headlights and the H5006 for low beam headlights across all model years from 1958-1966.
Both the H5001 and H5006 are sealed beam units, meaning the lens, reflector, and filament are fused into a single housing. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H5001 is a 4-inch square sealed beam unit operating at 12 volts and conforming to ANSI standards recognized in both the United States and Canada.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12 volts and built to the same ANSI standard as the H5001. Its round form factor distinguishes it physically from the square H5001 used in the high beam position.
Because the H5001 and H5006 differ in both shape and size, the two units are not interchangeable with each other despite sharing the same voltage rating and regulatory standard.
The ANSI standardization of both units means that any H5001 or H5006 sealed beam produced to that specification is dimensionally and electrically consistent across manufacturers, allowing cross-brand substitution within the same part designation.