Mazda Miata Headlight Bulb Size

The Mazda Miata headlight bulb size chart specifies high beam and low beam bulb sizes including 9005, 9003, 9006, and H6024 for this vehicle model. The replacement chart covers 1990 to 2005 production years with corresponding bulb size data.

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
2001-2005	9005	HB3	Check Price
1999-2000	9003	H4	Check Price
1990-1997	H6024	H6024	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
2001-2005	9006	HB4	Check Price
1999-2000	9003	H4	Check Price
1990-1997	H6024	H6024	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). Dual-filament halogen bulb with P43t base. 12V, 60W/55W.	9003	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). Single-filament halogen bulb with P22d base. 12V, 55W.	9006	Check Price

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Additional Notes

The H6024 is a 7-inch round sealed beam unit, meaning the lens, reflector, and filament are fused into a single assembly. The Mazda Miata used this format across all trims from 1990-1997 for both high and low beam positions, with the entire unit replaced rather than an internal bulb.
The 9003 bulb type is a dual-filament halogen unit rated at 12V with a 60W filament for high beam and a 55W filament for low beam, all housed within a single P43t-base bulb. The Miata used this single bulb to serve both beam functions in the 1999-2000 model years.
From 2001-2005, the Mazda Miata transitioned to a split-function headlight system, using the 9005 for high beam and the 9006 for low beam as separate, dedicated bulbs rather than a single dual-filament unit.
The 9005 is a single-filament halogen bulb with a P20d base, rated at 12V and 65W. The 9006 shares the same single-filament halogen construction but uses a P22d base and draws 55W. The differing base types mean the two bulbs are not physically interchangeable, even though they serve the same vehicle.
All four bulb types in these specifications, the 9005, 9006, 9003, and H6024, conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical specifications across manufacturers.
The 9003 bulb, used in the 1999-2000 Miata, operates at a combined wattage draw across both filaments, with the high beam filament consuming 5W more than the low beam filament. This wattage difference is a fixed characteristic of the 9003 standard.