The Rover 3500S uses H5001 bulbs for high beam headlights and H5006 bulbs for low beam headlights, with each size serving distinct lighting functions. The replacement chart covers vehicle production spanning 1969 to 1971 and documents the corresponding bulb specifications for those model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Rover 3500S uses two distinct sealed beam unit types across its 1969-1971 model years: the H5001 for high beam and the H5006 for low beam headlights.
The H5001 is a 4-inch square sealed beam unit operating at 12V. It conforms to ANSI standards applicable in the United States 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 units, meaning the lens, reflector, and filament form a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The square profile of the H5001 and the round profile of the H5006 make the two units physically incompatible with each other's housings, and substitution between them is not possible.
The high beam and low beam functions on the Rover 3500S are handled by separate, dedicated sealed beam units rather than a single dual-filament assembly, which is consistent with the separate H5001 and H5006 fitments listed across all three model years.
The H5001 and H5006 designations follow ANSI standardization, which means units from different manufacturers sharing the same designation are generally interchangeable provided they meet the same standard.