Fiat 128 headlight bulbs utilize the H6024 size for both high beam and low beam applications. The replacement chart covers vehicle production spanning 1971 to 1979.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6024 is the sole bulb type listed across all headlight positions for the Fiat 128, covering model years 1971-1979 for both high beam and low beam functions.
The H6024 is an ANSI-standardized sealed beam unit, meaning the lens, reflector, and filament are fused into a single non-serviceable assembly. When the filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H6024 unit is a 7-inch round sealed beam format, a design that was standardized for the North American market under ANSI regulations and recognized in both the United States and Canada.
The H6024 operates at 12 volts, consistent with the 12-volt electrical systems standard in passenger vehicles of that era.
The Fiat 128 uses the same H6024 unit for both high beam and low beam functions across all listed years, indicating a dual-filament sealed beam design. The H6024 sealed beam type contains two filaments within a single unit to serve both lighting modes.
Because the H6024 is an ANSI-standardized format, replacement units from multiple manufacturers are generally interchangeable at the housing level, provided the replacement unit also conforms to the H6024 specification.