The Mazda 3 high beam headlight uses a 9005 bulb size, while low beam headlight applications require either H7 or D2S bulb sizes. The replacement chart covers vehicle production years from 2004 to 2009 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.
The Mazda 3 uses the 9005 bulb for the high beam headlight across all listed model years, spanning 2004-2009. The 9005 is an ANSI-standard single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base, and is the prevailing standard in the United States and Canada.
The low beam headlight on the Mazda 3 follows a dual-fitment structure across 2004-2009, where the correct bulb depends on which headlamp system the vehicle was built with. Halogen-equipped vehicles take the H7, while HID-equipped vehicles take the D2S.
The H7 is an ECE-standard single-filament halogen bulb rated at 12V and 55W, using a PX26d base. Although it originates from European and worldwide regulatory standards, it also carries approval for use in the United States and Japan.
The D2S is a high-intensity discharge (xenon) bulb rated at 85V and 35W, using a P32d-2 base. Unlike halogen bulbs, it does not contain a traditional filament and instead produces light through an electrical arc between two electrodes within a xenon gas-filled capsule.
The D2S is specifically designed for projector-type headlamp housings and requires an external ignitor to initiate the high-voltage arc needed for operation. It is not compatible with standard reflector-type housings.
The 9005 and H7 are both single-filament halogen bulbs, but they are not interchangeable. They differ in base type, wattage, and regulatory standard, meaning each is physically and electrically specific to its designated socket and housing.
The H7 operates at 55W compared to the 9005's 65W, reflecting the differing output requirements between low beam and high beam functions. The lower wattage of the H7 is consistent with its role in providing a controlled, downward-directed beam pattern.
Because the Mazda 3 low beam accepts either an H7 or a D2S depending on headlamp type, confirming the factory-installed headlamp system is a necessary step before selecting a replacement bulb, as the two types are electrically and mechanically incompatible with each other's housings.