Oldsmobile Custom Cruiser Headlight Bulb Size

The Oldsmobile Custom Cruiser uses high beam headlight bulbs in 9004, H4651, and H5001 sizes, along with low beam headlight bulbs in 9004, H4656, and H4652 sizes. The replacement chart covers vehicle production years spanning 1971 to 1992.

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
1991-1992	9004	HB1	Check Price
1976-1990	H4651	H4651	Check Price
1971-1975	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
1991-1992	9004	HB1	Check Price
1990	H4656	H4656	Check Price
1989	H4652	H4652	Check Price
1986-1988	H4656	H4656	Check Price
1985	H4652	H4652	Check Price
1983-1984	H4656	H4656	Check Price
1981-1982	H4652	H4652	Check Price
1978-1980	H4656	H4656	Check Price
1977	H4652	H4652	Check Price
1976	H4656	H4656	Check Price
1971-1975	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 Oldsmobile Custom Cruiser uses three distinct headlight technologies across its production span: sealed beam units in rectangular and round form factors, and a dual-filament halogen bulb introduced in the 1991-1992 model years.
The 9004 is a dual-filament halogen bulb rated at 12V with a 65W high beam filament and a 45W low beam filament, mounted on a P29t base. Because both filaments are housed in a single bulb, one 9004 unit serves both the high and low beam functions on the 1991-1992 Custom Cruiser.
The H4651, H4652, and H4656 are all 4x6-inch rectangular sealed beam units operating at 12V. The H4652 is a variant of the H4651, and while the two share the same physical format, they are not interchangeable with each other or with the H4656 without confirming the correct beam pattern for the specific model year.
The H5001 and H5006 are sealed beam units in a round form factor, both operating at 12V. The H5001 is a 4-inch square sealed beam used for the high beam, while the H5006 is a 5.75-inch round sealed beam used for the low beam on the 1971-1975 Custom Cruiser.
All sealed beam types, including the H4651, H4652, H4656, H5001, and H5006, are self-contained units in which the lens, reflector, and filament form a single assembly. When the filament fails, the entire unit requires replacement rather than a bulb swap.
The low beam specification for the Custom Cruiser varies across individual years even within the same general era. For example, the H4652 appears in 1977, 1981-1982, 1985, and 1989, while the H4656 is specified for surrounding years, making year-specific confirmation necessary before sourcing a replacement sealed beam.
All bulb types listed across both high and low beam positions conform to ANSI standards applicable in the United States and Canada, indicating standardized fitment within that regulatory framework.
The high beam position used the H4651 consistently across the 1976-1990 model years, representing the longest uninterrupted use of a single bulb type in the Custom Cruiser headlight specifications.