Dodge Shadow Headlight Bulb Size

Dodge Shadow headlight bulbs utilize a 9004 and H4666 bulb size for both high beam and low beam applications. The replacement chart covers vehicle production spanning 1987 to 1994.

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
1989-1994	9004	HB1	Check Price
1987-1988	H4666	H4666	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
1989-1994	9004	HB1	Check Price
1987-1988	H4666	H4666	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). Rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4666	Check Price

Other Locations

Additional Notes

The Dodge Shadow uses two distinct headlight technologies across its model years. The 9004 bulb appears in 1989-1994 models, while the H4666 sealed beam unit is fitted to 1987-1988 models.
The 9004 is a dual-filament halogen bulb, meaning a single bulb handles both high beam and low beam functions through two separate filaments within one housing. This is confirmed by the specifications, which list the 9004 for both the high beam and low beam positions across 1989-1994.
The 9004 operates at 12 volts and carries a wattage rating of 65W on the high beam filament and 45W on the low beam filament. The higher wattage on the high beam filament produces a brighter, longer-range light output compared to the low beam.
The 9004 uses a P29t base, which is a specific connector type. Bulbs with a different base type are not physically compatible with the socket, regardless of voltage or wattage ratings.
The H4666 is a rectangular sealed beam unit rather than a replaceable bulb. When the light source fails in a sealed beam design, the entire unit requires replacement rather than just an internal bulb.
Both the 9004 and H4666 conform to ANSI standards applicable in the United States and Canada, meaning they meet the photometric and dimensional requirements defined by that regulatory framework for those markets.
The H4666 sealed beam unit operates at 12 volts. Unlike the 9004, no separate wattage figures for individual beam modes are listed in the specifications for this unit.
Because the 1987-1988 Shadow uses a sealed beam H4666 and the 1989-1994 Shadow uses a socketed 9004 halogen bulb, the two headlight systems are not interchangeable between those model year groups.