Toyota Corona high beam headlight bulbs utilize H4651 or H5001 size specifications, while low beam applications require H4652, H4656, or H5006 bulb sizes. The replacement chart covers vehicle production spanning 1969 to 1982 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 Toyota Corona uses two distinct sealed beam form factors across its 1969-1982 model range: a 4-inch square unit and a 4x6-inch rectangular unit, with the transition occurring between the 1977 and 1978 model years.
All five bulb types listed in these specifications, H4651, H4652, H4656, H5001, and H5006, are ANSI-standardized sealed beam units rated at 12V and approved for use in the United States and Canada.
Sealed beam units are self-contained assemblies in which the filament, reflector, and lens are fused into a single glass envelope. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H5001 high beam and H5006 low beam are 4-inch square and 5.75-inch round units, respectively, and both were fitted to the Toyota Corona from 1969-1977.
From 1979-1981, the low beam position uses the H4656, while the high beam uses the H4651. These are distinct ANSI types and are not interchangeable with each other despite sharing the same 4x6-inch rectangular form factor.
The 1982 Toyota Corona presents a unique pairing: the high beam retains the H4651, while the low beam shifts to the H4652, which is a variant of the H4651 within the same rectangular sealed beam family.
The H4652 is classified as a variant of the H4651. Although both occupy the 4x6-inch rectangular sealed beam format, they serve different beam functions and are not substitutes for one another in a correctly specified fitment.