Kenworth K130 high beam headlight bulbs use H4651 size while low beam headlight bulbs use H4652 or H4656 size. The replacement chart contains vehicle production years and bulb size specifications spanning 1987 to 1993.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H4651, H4652, and H4656 bulb types are all ANSI-standardized 4x6-inch rectangular sealed beam units operating at 12V, meaning the entire lens-and-filament assembly is replaced as one unit rather than a separate bulb being swapped out.
The Kenworth K130 uses the H4651 for the high beam headlight across all listed model years, 1987-1993, without variation.
The H4651 and H4652 are variants of the same 4x6-inch rectangular sealed beam format, sharing the same physical housing standard while differing in their filament configuration, with H4651 designated for high beam use and H4652 for low beam use.
The H4656 is also a 4x6-inch rectangular sealed beam unit and is not interchangeable with the H4652 despite sharing the same physical format, as each carries a distinct ANSI designation reflecting differences in beam pattern or filament output.
For the low beam headlight on the Kenworth K130, the 1991 and 1988 model years require the H4656, while 1987, 1989, 1990, 1992, and 1993 require the H4652, making year verification necessary before sourcing a replacement unit.