The MG MGB uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1969 to 1980 production years 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 MG MGB uses the H6024 bulb size for both high beam and low beam headlights across all listed model years from 1969-1980.
The H6024 is an ANSI-standard sealed beam unit recognized in the United States and Canada, operating at 12 volts.
A sealed beam unit integrates the filament, reflector, and lens into a single glass assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6024 follows a 7-inch round form factor, which was a regulated standard size for sealed beam headlights in North America during this period.
Because the high beam and low beam positions share the same H6024 specification on the MGB, a single unit type serves both functions, though each position occupies a separate housing.
The consistent use of one sealed beam type across both beam positions and all listed years means there is no variation in fitment requirements within this specification set.