The Oldsmobile Jetstar 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 1964 to 1966 with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Oldsmobile Jetstar 88 uses the H5001 sealed beam unit for high beam headlights across the 1964-1966 model years.
The H5001 is a 4-inch square sealed beam unit operating at 12V. It conforms to ANSI standards recognized in both the United States and Canada.
As a sealed beam unit, the H5001 is not a replaceable bulb in the conventional sense. The entire unit is replaced when the light fails.
Low beam headlights on the Jetstar 88 use the H5006 sealed beam unit across the same 1964-1966 model years.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and conforming to the same ANSI standards as the H5001.
Like the H5001, the H5006 is a sealed beam unit requiring full unit replacement rather than bulb replacement alone.
The square format of the H5001 and the round format of the H5006 reflect distinct physical housings, meaning the two units are not interchangeable with each other despite sharing the same voltage rating and standards body.