The Hino SG3323 front turn signal uses a 1156 bulb size while the rear turn signal requires a P21W bulb size. The replacement chart covers 1993 to 1995 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 SG3323 uses the 1156 bulb for the front turn signal across the 1993-1995 model years.
The 1156 is an ANSI-standard single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base, and is the designated standard for the United States and Canada.
The rear turn signal on the Hino SG3323 uses the P21W bulb across the same 1993-1995 model years.
The P21W is an ECE-standard single-filament signalling bulb also rated at 12V and 21W, sharing the BA15s bayonet base format, and follows the European and worldwide regulatory standard.
Although the 1156 and P21W share identical electrical ratings of 12V and 21W as well as the same BA15s bayonet base, they are governed by different regional standards, ANSI and ECE respectively, which affects their regulatory compliance depending on the market.
The physical compatibility of the BA15s base between the 1156 and P21W means one bulb may fit the socket of the other, but substituting one for the other may not satisfy regional lighting regulations for the intended position.