Plymouth Turismo high beam headlight bulbs use H4651 size, while low beam headlight bulbs use H4656 or H4652 size specifications. The replacement chart covers vehicle production years spanning 1983 to 1987 with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Turismo uses H4651, H4656, and H4652 bulb types across its high beam and low beam headlight positions for the 1983-1987 model years.
All three bulb types are ANSI-standardized sealed beam units recognized in both the United States and Canada, operating at 12 volts.
Each unit follows the 4x6-inch rectangular sealed beam format, a common form factor in North American automotive lighting standardization during this era.
Sealed beam units of this type do not contain a replaceable internal bulb element. When a unit fails, the entire sealed assembly requires replacement.
The H4651 serves as the high beam headlight across all five model years of the Turismo (1983-1987), making it the only bulb type with an uninterrupted fitment record across the full production span covered in these specifications.
The H4652 is classified as a variant of the H4651. Both share the same sealed beam format and voltage rating, though they are designated for different lighting functions and are not interchangeable without confirming the specific position and model year.
The low beam position on the Plymouth Turismo does not use a single consistent bulb type across all years. The H4656 applies to the 1984 and 1987 model years, while the H4652 applies to 1983, 1985, and 1986.