The Mazda MX-5 Miata high beam headlight uses an H9 bulb size while the low beam headlight requires either an H7 or D2S bulb size. The replacement chart covers vehicle production years spanning 2006 to 2015 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 H9 bulb is the sole high beam specification for the Mazda MX-5 Miata across the 2006-2015 model years. It is a single-filament halogen type rated at 12V and 65W, built to the ECE standard and recognized in the US market. Its base type is PGJ19-5.
The low beam position across the same 2006-2015 span accommodates two distinct bulb types depending on the headlamp system fitted to the vehicle. Halogen capsule headlamp variants take the H7, while HID headlamp variants take the D2S. These two types are not interchangeable with each other.
The H7 is a single-filament halogen bulb rated at 12V and 55W, drawing 10 watts less than the H9 used in the high beam position. It uses a PX26d base and carries ECE approval as well as recognition in the US and Japan.
The D2S is a high-intensity discharge bulb that operates on a fundamentally different electrical principle than the halogen types in these specifications. It runs at 85V and 35W and requires an external ignitor to initiate the arc discharge that produces light.
The D2S uses a P32d-2 base and is designed specifically for projector-type housings. Fitting it into a reflector housing would produce improper light distribution, making housing compatibility a critical factor beyond the base type alone.
All three bulb types in these specifications, the H9, H7, and D2S, conform to the ECE standard, which governs photometric and dimensional requirements for automotive lighting across Europe and many other markets worldwide.
The H9 and H7 share the same 12V operating voltage, which is consistent with standard automotive electrical systems, but their wattage and base types differ, making them physically and electrically non-interchangeable despite both being single-filament halogen bulbs.
Because the low beam fitment for the 2006-2015 MX-5 Miata depends on which headlamp system the vehicle was built with, confirming whether the vehicle has halogen capsule or HID headlamps is necessary before selecting a replacement low beam bulb.