Jaguar XJS Headlight Bulb Size

The Jaguar XJS high beam and low beam headlight bulbs utilize 9004 and H5001 sizes for high beam applications, along with 9004 and H5006 sizes for low beam functions. The replacement chart covers 1976 through 1996 production years 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.

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
1990-1996	9004	HB1	Check Price
1976-1989	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
1990-1996	9004	HB1	Check Price
1976-1989	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). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001	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 Jaguar XJS uses two distinct headlight technologies across its production span. Model years 1976-1989 rely on sealed beam units, while 1990-1996 models use a replaceable halogen bulb format.
The 9004 is a dual-filament halogen bulb operating at 12V with a P29t base, rated at 65W on high beam and 45W on low beam. A single bulb type serves both the high beam and low beam functions in the Jaguar XJS for model years 1990-1996.
Because the 9004 carries both filaments within one housing, it functions as a dual-beam unit. This means one bulb per headlight assembly handles both lighting modes rather than requiring separate bulbs for each.
The H5001 is a 4-inch square sealed beam unit conforming to ANSI standards for the US and Canadian markets. It operates at 12V and serves the high beam function on the Jaguar XJS for model years 1976-1989.
The H5006 is a 5.75-inch round sealed beam unit, also ANSI-rated for US and Canadian markets, operating at 12V. It serves the low beam function on the XJS for the same 1976-1989 period.
Sealed beam units such as the H5001 and H5006 are not serviceable at the bulb level. When the light source fails, the entire sealed assembly requires replacement rather than an internal component.
The H5001 and H5006 are physically distinct units with different form factors, a square profile versus a round one, meaning they are not interchangeable with each other despite both being sealed beam types used on the same vehicle generation.
All three bulb types listed across the XJS specification, the 9004, H5001, and H5006, conform to ANSI standards applicable to the US and Canadian markets and operate on a 12V electrical system.