The BMW 2500 uses an H5001 bulb size for high beam headlight operation and an H5006 bulb size for low beam headlight operation. The replacement chart covers 1969 to 1971 model 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 BMW 2500 uses H5001 sealed beam units for high beam headlights across the 1969-1971 model years, and H5006 sealed beam units for low beam headlights across the same span.
The H5001 is a 4-inch square sealed beam unit operating at 12V. It conforms to ANSI standards applicable in the US and Canada.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and built to the same ANSI standard covering the US and Canadian markets.
Both the H5001 and H5006 are sealed beam assemblies, meaning the lens, reflector, and filament form a single non-serviceable unit. When the filament fails, the entire assembly requires replacement rather than an internal bulb swap.
The square format of the H5001 and the round format of the H5006 are physically distinct, and the two units are not interchangeable with each other or with bulb-style housings that accept replaceable capsules.
The shared 12V operating voltage between the H5001 and H5006 is consistent with the standard 12-volt electrical systems used in passenger vehicles of that era, though voltage compatibility alone does not make the two units substitutable for one another.