Hino SG231 front and rear side marker bulbs use 194 and 67 bulb sizes respectively. The replacement chart covers 1989 to 1992 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 Hino SG231 uses two distinct bulb types across its side marker positions: the 194 for the front and the 67 for the rear, covering model years 1989-1992.
The 194 is an ANSI-standardized miniature wedge bulb of the T10 type, rated at 12V and 3.78W, and is among the lower-wattage bulbs commonly found in marker and courtesy light applications.
The T10 wedge base of the 194 requires no locking mechanism for retention; the bulb is held in its socket by the friction of the wedge-shaped base itself.
The 67 is an ANSI-standardized single-filament bulb fitted with a BA15s bayonet base, rated at 12V and 8W, making it notably higher in wattage than the 194 used at the front.
The BA15s designation on the 67 indicates a single-contact bayonet base with a 15mm collar, which is not interchangeable with the dual-contact BA15d base found on some other automotive bulbs.
The 67 is described as a lower-wattage variant of the 1156; while both share the BA15s bayonet base, the 1156 is rated at approximately 26.9W, making the two bulbs electrically incompatible as direct substitutes despite their physical similarity.
Both the 194 and 67 conform to ANSI standards applicable in the United States and Canada, indicating standardized dimensional and electrical tolerances within those markets.
The front and rear side marker positions on the Hino SG231 use different base types, meaning bulbs from one position cannot be physically installed in the other without modification.