The Pontiac Fiero high beam and low beam headlight bulbs both utilize the H6054 size. The replacement chart covers vehicle production spanning 1984 to 1988.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6054 is an ANSI-standardized sealed beam unit used across the full 1984-1988 production run of the Pontiac Fiero for both high beam and low beam headlight positions.
A sealed beam unit differs from a modern halogen or HID bulb in that the filament, reflector, and lens are fused into a single glass assembly, meaning the entire unit is replaced rather than just an internal bulb.
The H6054 follows a 5x7-inch rectangular form factor, which is a standardized size shared across many North American vehicles of that era, governed by ANSI regulations applicable in both the United States and Canada.
Because the H6054 is a standardized ANSI unit, physically compatible replacements from multiple manufacturers are generally interchangeable, provided they conform to the same 5x7-inch rectangular sealed beam specification.
The H6054 operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles of that period.
The Fiero uses the same H6054 unit for both the high beam and low beam functions, indicating the vehicle relies on a single sealed beam type to serve dual lighting roles rather than separate bulb types for each function.