Plymouth Reliant high beam and low beam headlight bulbs both utilize the H6054 size. The replacement chart covers vehicle production spanning 1981 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Reliant uses the H6054 bulb size for both high beam and low beam headlights across all model years covered in the specifications, spanning 1981-1989.
The H6054 is a 5x7-inch rectangular sealed beam unit, meaning the lens, reflector, and filament are fused into a single glass housing rather than a separate replaceable bulb inside a housing.
Because the H6054 is a sealed beam design, the entire unit is replaced when the light fails, not an individual bulb element.
The H6054 operates at 12 volts and conforms to ANSI standards recognized in both the United States and Canada.
The same H6054 unit serves both the high beam and low beam functions on the Plymouth Reliant, which is a characteristic of certain sealed beam designs that house dual filaments within one unit to produce both light modes.
The H6054 designation follows a standardized sizing system, which means units from different manufacturers sharing that designation are generally interchangeable, provided they carry the same ANSI rating.