The Kenworth K130 front side marker utilizes 904, 1157, or 67 bulb sizes, while the rear side marker employs 67 or 904 bulb sizes. The replacement chart covers 1987 through 1993 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 Kenworth K130 front and rear side marker positions draw from three distinct ANSI-standard bulb types across the 1987-1993 model years: the 904, 1157, and 67.
The 904 is a T10 miniature wedge bulb rated at 12V and 8W. Its wedge base design means it requires no separate socket locking mechanism, as the bulb body itself creates the electrical contact when inserted.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W/5W filament split. The dual-filament construction allows one circuit to serve a brighter function and the other a dimmer standby or marker function within the same housing.
The 67 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 8W. It is a lower-wattage variant of the 1156 and shares the same base type, though the two are not electrically identical due to the wattage difference.
The 1157 and 67 both use bayonet-style bases but are not interchangeable. The 1157 uses a BAY15d base with offset pins and dual filaments, while the 67 uses a BA15s base with a single filament, making the socket configurations physically and electrically distinct.
The front side marker on the Kenworth K130 used the 1157 in 1989 and 1991-1992, which is a notably higher-wattage bulb than the 904 or 67 used in the remaining front marker years.
The rear side marker position used the 904 in 1987-1988, 1990-1991, and 1993, making it the most frequently specified bulb for that position across the listed model years.
The front and rear side marker positions do not share the same bulb type in any single model year across the 1987-1993 range, indicating that the two positions consistently required separate bulb part numbers throughout this period.