Daihatsu Rocky high beam and low beam headlight bulbs both utilize H6054 size bulbs for optimal illumination. The replacement chart covers 1990 to 1992 production years with corresponding bulb specifications.
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-standard sealed beam unit used in both the high beam and low beam positions of the Daihatsu Rocky across the 1990-1992 model years.
A sealed beam unit integrates the filament, reflector, and lens into a single non-serviceable assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6054 follows a 5x7-inch rectangular form factor, which is a standardized size shared across many vehicles produced for the US and Canadian markets.
Because the H6054 is an ANSI-standardized unit, physically compatible replacements from various manufacturers are generally interchangeable, provided they conform to the same rectangular sealed beam specification.
The Rocky uses the same H6054 unit for both high and low beam functions, indicating the vehicle relies on a dual-filament sealed beam design rather than separate housings for each beam type.
The H6054 operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles of that era.