Buick Electra Headlight Bulb Size

The Buick Electra headlight bulb size chart documents high beam and low beam headlight bulb specifications, with high beam sizes including 9004, H4651, and H5001, while low beam sizes include 9004, H4656, and H4652. The replacement chart covers vehicle production years spanning 1959 to 1990.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1990	9004	HB1	Check Price
1976-1986	H4651	H4651	Check Price
1959-1975	H5001	H5001	Check Price

Low Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1990	9004	HB1	Check Price
1986	H4656	H4656	Check Price
1984-1985	H4652	H4652	Check Price
1981-1983	H4656	H4656	Check Price
1980	H4652	H4652	Check Price
1979	H4656	H4656	Check Price
1978	H4652	H4652	Check Price
1976-1977	H4656	H4656	Check Price
1959-1975	H5006	H5006	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament halogen bulb with P29t base. 12V, 65W/45W.	9004	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4651	Check Price
ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4656	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit, variant of H4651. Not a replaceable bulb — the entire unit is replaced. 12V.	H4652	Check Price
ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5006	Check Price

Other Locations

Additional Notes

The 9004 is a dual-filament halogen bulb rated at 12V with a 65W high beam filament and a 45W low beam filament, using a P29t base. Because it serves both beam functions within a single unit, the Buick Electra's 1990 model year uses the same 9004 bulb for both the high beam and low beam positions.
The H5001 and H5006 are sealed beam units conforming to the ANSI standard for the US and Canadian markets. The H5001 is a 4-inch square unit used for the high beam position, while the H5006 is a 5.75-inch round unit used for the low beam position. Both operate at 12V, and neither contains a replaceable bulb; the entire sealed unit is the serviceable component. These types were fitted to the Electra from 1959 through 1975.
The H4651, H4652, and H4656 are all 4x6-inch rectangular sealed beam units operating at 12V under the ANSI standard. Like the round and square sealed beam types, none of these accept a replaceable internal bulb; the whole unit is replaced upon failure. The H4652 is specifically described as a variant of the H4651.
The Buick Electra used H4651 for the high beam position across 1976-1986, while the low beam position during that same general period alternated between H4652 and H4656 depending on the specific model year, indicating that the two beam positions used physically distinct sealed beam units throughout the rectangular sealed beam era.
The low beam sealed beam type for the Electra was not uniform across the rectangular sealed beam years. The H4656 was fitted in 1976-1977, 1979, 1981-1983, and 1986, while the H4652 appeared in 1978, 1980, 1984, and 1985. Substituting one for the other without confirming the correct year-specific fitment would be an error, as they are distinct ANSI part numbers despite sharing the same physical form factor.