Subaru DL Headlight Bulb Size

Subaru DL headlight bulb sizes include H4651, H6054, and H6024 for high beam applications, along with H4656, H4652, and H6054 options for low beam configurations, with each bulb size corresponding to specific vehicle specifications. The replacement chart covers 1975 through 1989 production years and documents bulb size specifications across the model's manufacturing span.

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 Type	Shop
1985-1989	H4651	Check Price
1982-1984	H6054	Check Price
1975-1981	H6024	Check Price

Low Beam Headlight

Years	Bulb Type	Shop
1987-1989	H4656	Check Price
1985-1986	H4652	Check Price
1982-1984	H6054	Check Price
1975-1981	H6024	Check Price

Bulb Specifications

Description	Type	Shop
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). 5x7-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6054	Check Price
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024	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

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Additional Notes

The Subaru DL uses sealed beam headlight units across all listed model years from 1975 to 1989. In a sealed beam design, the reflector, lens, and filament are fused into a single glass unit, meaning the entire assembly is replaced rather than an individual bulb.
All sealed beam types specified for the Subaru DL operate at 12 volts and conform to ANSI standards recognized in both the United States and Canada.
Three physical form factors appear across the specifications: a 7-inch round unit (H6024), a 5x7-inch rectangular unit (H6054), and a 4x6-inch rectangular unit, which covers the H4651, H4652, and H4656 types.
The Subaru DL (1975-1980) uses the H6024 for both high and low beam positions. This 7-inch round sealed beam unit is a dual-filament type, serving both functions within a single housing.
For 1982-1984, the Subaru DL uses the H6054 for both high and low beam positions. The H6054 is a 5x7-inch rectangular sealed beam unit and is also a dual-filament type capable of serving both beam functions.
From 1985 onward, the Subaru DL transitions to separate bulb types for high and low beam positions, indicating a move to a four-headlight system using dedicated single-filament 4x6-inch sealed beam units.
The H4652, used for low beam in 1985-1986, is a variant of the H4651 high beam unit. Although both are 4x6-inch rectangular sealed beams, the two types are not interchangeable due to differing beam pattern designs optimized for their respective functions.
For 1987-1989, the low beam position shifts from the H4652 to the H4656, while the high beam retains the H4651. The H4656 and H4651 share the same 4x6-inch rectangular housing size but are distinct part numbers and are not interchangeable with each other.