American Motors Concord headlight bulbs utilize H4651, H6054, and H4652 sizes depending on beam configuration and model variation. The replacement chart documents bulb specifications across the 1978 to 1983 production range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The American Motors Concord uses three sealed beam headlight types across its model years: H4651, H4652, and H6054. All three conform to ANSI standards recognized in both the United States and Canada and operate at 12 volts.
The H4651 and H4652 are both 4x6-inch rectangular sealed beam units, with the H4652 classified as a variant of the H4651. Despite their close relationship, they serve distinct functions: the H4651 is designated for high beam use, while the H4652 handles low beam output.
The H6054 is a 5x7-inch rectangular sealed beam unit, physically larger than the H4651 and H4652. This size difference means the H6054 is not interchangeable with either of the 4x6-inch units.
For the 1979-1983 American Motors Concord, the high beam and low beam headlights use separate bulb types, requiring two distinct sealed beam units per side.
The 1978 Concord uses the H6054 for both high beam and low beam functions, meaning a single sealed beam type serves both lighting roles that year.
All three bulb types are sealed beam units, meaning the lens, reflector, and filament are fused into one assembly. When a filament fails, the entire unit requires replacement rather than just an internal bulb.