The Oldsmobile Jetstar I uses an H5001 bulb size for high beam headlights and an H5006 bulb size for low beam headlights. The replacement chart covers 1964 to 1965 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 H5001 is a 4-inch square sealed beam unit operating at 12V, conforming to ANSI standards recognized in both the United States and Canada. It serves as the high beam headlight across the 1964-1965 Oldsmobile Jetstar I.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and built to the same ANSI standard. It fills the low beam headlight position for both model years covered in the specifications.
Both the H5001 and H5006 are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The high and low beam positions on the Jetstar I use physically distinct sealed beam formats. The square H5001 and the round H5006 are not interchangeable with each other due to their differing form factors and designated beam functions.