Mitsubishi 3000GT Headlight Bulb Size

The Mitsubishi 3000GT uses 9005 and 9006 bulb sizes for high and low beam headlight applications, with H4666 representing an alternative bulb size designation. The replacement chart covers vehicle production spanning 1991 to 1999.

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
1994-1999	9005	HB3	Check Price
1991-1993	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
1994-1999	9006	HB4	Check Price
1991-1993	H4666	H4666	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament halogen bulb with P20d base. 12V, 65W.	9005	Check Price
ANSI standard (US & Canada). Rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4666	Check Price
ANSI standard (US & Canada). Single-filament halogen bulb with P22d base. 12V, 55W.	9006	Check Price

Other Locations

Additional Notes

The Mitsubishi 3000GT uses two distinct headlight technologies across its model years, with the 1991-1993 models using H4666 sealed beam units for both high and low beam functions, while the 1994-1999 models use separate 9005 and 9006 halogen bulbs for high and low beams respectively.
The H4666 is a rectangular sealed beam unit conforming to ANSI standards for the US and Canadian markets. Unlike a conventional replaceable bulb, the lens, reflector, and filament form a single sealed assembly, meaning the entire unit requires replacement when the light fails.
The 9005 is a single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base. It serves exclusively as the high beam bulb on 1994-1999 3000GT models and is an ANSI-standardized type used across the US and Canadian markets.
The 9006 is a single-filament halogen bulb rated at 12V and 55W, fitted with a P22d base. It serves as the low beam bulb on 1994-1999 models. Its wattage is 10W lower than the 9005 used in the high beam position on the same vehicles.
The P20d base of the 9005 and the P22d base of the 9006 are physically distinct, which means the two bulb types are not interchangeable despite their similar appearance and shared voltage rating.
The transition from H4666 sealed beam units to separate 9005 and 9006 halogen bulbs occurred between the 1993 and 1994 model years, representing a shift from a single integrated assembly to a dual-bulb replaceable system.
All three bulb types specified for the 3000GT, the 9005, 9006, and H4666, conform to ANSI standards applicable to the US and Canadian markets.