Oldsmobile Cutlass Salon Headlight Bulb Size

The Oldsmobile Cutlass Salon headlight bulb specifications include 9004, H4651, and H6054 sizes for high beam applications and 9004, H4656, and H6054 sizes for low beam functions. The replacement chart covers vehicle production years spanning 1975 through 1987 with corresponding bulb size data.

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

High Beam Headlight

Years	Bulb Size
1987	9004
1985-1986	H4651
1980	H4651
1978-1979	H6054
1976-1977	H4651
1975	H6024

Low Beam Headlight

Years	Bulb Size
1987	9004
1985-1986	H4656
1980	H4656
1978-1979	H6054
1976-1977	H4652
1975	H6024

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament halogen bulb with P29t base. 12V, 65W/45W.	9004
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4651
ANSI standard (US & Canada). 5x7-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6054
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4656
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit, variant of H4651. Not a replaceable bulb — the entire unit is replaced. 12V.	H4652

Other Locations

Additional Notes

The 1987 Oldsmobile Cutlass Salon uses the 9004 bulb for both high and low beam headlights. This is a dual-filament halogen bulb with a P29t base, rated at 12V with 65W on high beam and 45W on low beam. A single bulb type serving both functions is characteristic of a dual-filament design, where one envelope contains two separate filaments.
For model years 1975-1986, all headlight types across the Cutlass Salon specifications are sealed beam units. These are self-contained glass assemblies in which the lens, reflector, and filament form a single unit. When a sealed beam fails, the entire assembly requires replacement rather than just an internal bulb.
The H4651 and H4656 are both 4x6-inch rectangular sealed beam units operating at 12V. H4651 appears in the high beam position for 1976-1977 and 1980 and 1985-1986, while H4656 fills the low beam position for those same years. The two types are not interchangeable despite sharing the same physical format, as each is optimized for its respective beam function.
The H4652, used in the low beam position for 1976-1977, is a variant of the H4651 within the same 4x6-inch rectangular sealed beam format. It is listed separately from H4656, indicating a distinct specification despite the shared physical size.
The H6054 sealed beam unit, a 5x7-inch rectangular format operating at 12V, serves both the high and low beam positions for 1978-1979. Its use in both positions means a single sealed beam type covers the full headlight system for those two years.
The H6024, used in both beam positions for 1975, is a 7-inch round sealed beam unit rated at 12V. Round sealed beams of this size were a common format in North American vehicles before rectangular sealed beams became prevalent.
All bulb and sealed beam types listed across the Cutlass Salon specifications conform to ANSI standards applicable in both the United States and Canada, indicating regulatory compliance across both markets for every model year represented.
The transition from sealed beam technology in 1986 to the 9004 halogen bulb in 1987 represents a shift in headlight architecture. Unlike sealed beams, the 9004 allows the outer lens and housing to remain in place while only the internal bulb is replaced.