Mitsubishi Tredia Headlight Bulb Size

The Mitsubishi Tredia high beam and low beam headlight bulbs utilize 9004 and H6054 size specifications. The replacement chart covers vehicle production spanning 1983 to 1988.

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
1986-1988	9004	HB1	Check Price
1983-1985	H6054	H6054	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
1986-1988	9004	HB1	Check Price
1983-1985	H6054	H6054	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). 5x7-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6054	Check Price

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Additional Notes

The Mitsubishi Tredia uses two distinct headlight technologies across its production run, with the H6054 sealed beam unit fitted to 1983-1985 models and the 9004 halogen bulb fitted to 1986-1988 models.
The 9004 is a dual-filament halogen bulb, meaning a single bulb serves both high beam and low beam functions through two separate filaments operating at 65W and 45W respectively on a 12V system.
The H6054 is a 5x7-inch rectangular sealed beam unit rated at 12V. Because the reflector, lens, and filament are fused into one assembly, the entire unit is replaced rather than an internal bulb.
On 1986-1988 Tredia models, the 9004 bulb uses a P29t base, which is a specific connector type that must be matched when sourcing a replacement.
Both the 9004 and H6054 are ANSI-standardized types recognized in the United States and Canada, meaning they conform to defined performance and physical specifications set by that standards body.
Because the 9004 handles both high and low beam output in a single unit, the high beam and low beam headlight positions on 1986-1988 models share the same bulb specification rather than requiring separate part numbers for each function.
The H6054 sealed beam format used on 1983-1985 models does not allow for bulb-only replacement; a failed unit requires the full sealed assembly to be sourced and swapped out.
The 9004 and H6054 are not interchangeable with each other, as they differ in base type, physical format, and installation method, making the 1985-to-1986 model year transition a point of incompatibility between parts.