Miata headlights are bought by chassis code, not as a one-size lamp. NA pop-ups take a 7-inch round sealed beam, NB cars use a different projector housing, and NC or ND models keep a factory-shaped assembly. A cheap LED bulb in an old reflector often glares and still looks dim on canyon roads.
NA 7-inch round sealed beam versus NB projector housing versus NC or ND factory-shaped lamps
DOT-style LED sealed units versus halo projector aftermarket pairs versus a halogen bulb-only swap
Aimed high and low beams versus a decorative halo ring that never gets a cutoff check
Match the listing to your year, then check whether you are replacing the whole lamp or only the insert.
FAQs
No. NA pop-ups use 7-inch round sealed beams. NB housings are a different projector shape, and NC or ND lamps follow the later body. A 7-inch LED bucket will not drop into an ND. Confirm the generation on the listing before you compare brightness claims.
On an NA, a purpose-built 7-inch LED sealed beam such as a Morimoto Sealed7 or Truck-Lite unit keeps the light source where the reflector expects it. Retrofit bulbs in halogen optics often scatter and blind oncoming traffic. If the page only says bright LED, look for a cutoff photo.
Some Spec-D style halo projectors are sold as DOT-marked pairs, but many halo rings are daytime running lights, not a legal low beam. Check whether the listing shows a sharp cutoff and separate high-beam output. Decorative halos that never get aimed are a show piece, not a night-drive lamp.
Later cars already have decent projectors, so owners more often swap bulbs or assemblies built for that housing, not a 7-inch round. Flyin’ Miata notes some NC low-beam LED bulbs fight the factory optics. Buy the lamp named for your exact years, not a universal Miata kit.
Look at plug type, whether the pair includes both sides, and whether you still have to aim the lamps after install. Powder-coated aluminum buckets shed heat better than thin plastic. If the listing skips generation and diameter, treat it as incomplete.
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