Plymouth Plaza high beam and low beam headlight bulbs utilize H5001, H6024, H6006, and H5006 sizes depending on configuration and model variation. The replacement chart covers 1954 through 1958 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Plaza uses four distinct sealed beam bulb types across its headlight system: H5001, H5006, H6006, and H6024. All four conform to ANSI standards applicable in both the United States and Canada, and all operate on a 12V electrical system.
Each of these bulb types is a sealed beam unit, meaning the lens, reflector, and filament are fused into a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H6006 is the most frequently specified bulb across the Plymouth Plaza headlight data, covering both high beam and low beam positions for the 1954-1955 model years. It is a 5x7-inch rectangular sealed beam unit.
The 1956 Plymouth Plaza uses the H6024 for both the high beam and low beam positions. The H6024 is a 7-inch round sealed beam unit, making it physically distinct from all other bulb types listed in these specifications.
For the 1957-1958 model years, the high beam and low beam positions use different bulb types. The high beam position takes the H5001, a 4-inch square sealed beam unit, while the low beam position takes the H5006, a 5.75-inch round sealed beam unit.
The H5001 and H5006 are not interchangeable with each other or with the H6006 and H6024, as each has a distinct physical form factor: square, round at 5.75 inches, rectangular, and round at 7 inches, respectively.
The shift from the H6006 rectangular format in 1954-1955 to the H6024 round format in 1956, and then to the H5001 and H5006 pairing in 1957-1958, reflects changes in headlight configuration across the Plaza's production span.
Because all listed bulb types are sealed beam units built to ANSI standards, substitution between form factors is not supported by the specifications, and physical fitment is determined by the specific housing design of each model year.