The Isuzu Amigo turn signal requires bulb size 1156 or P21W depending on the specific configuration of the lighting assembly. Data for the bulb specifications covers the range from 1998 to 2000.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Isuzu Amigo front turn signal uses the 1034 bulb for model years 1989-1994, then transitions to the 1157 bulb for 1998-2000.
The 1157 is a dual-filament bulb operating at 12V with a 21W/5W output and a BAY15d bayonet base, conforming to ANSI standards for the US and Canada.
The 1034 is also a dual-filament bulb with a BAY15d bayonet base, rated at 12V and 21/5W, and is classified as a variant of the 1157 under ANSI standards.
Although the 1034 and 1157 share the same BAY15d base type and wattage ratings, the 1034 is a variant rather than a direct equivalent, which means substitution between the two warrants caution.
The rear turn signal on the Isuzu Amigo uses the 1156 for 1989-1999, while the 2000 model year uses the 1157 instead.
The 1156 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W, conforming to ANSI standards for the US and Canada.
The BA15s base of the 1156 and the BAY15d base of the 1157 are physically distinct, making these two bulbs non-interchangeable despite sharing the same 21W output rating.
The 2000 model year Isuzu Amigo is the only year in the specifications where both the front and rear turn signals use the same bulb type, the 1157.