The Isuzu Amigo side marker uses 1157NA and 1157 bulb sizes for the lighting components located on the exterior of the vehicle. Data for the specific bulbs covers the range from 1998 through 2000.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The two bulb types present across the Isuzu Amigo side marker specifications are the 1157 and the 194, both of which conform to ANSI standards recognized in the United States and Canada.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a wattage split of 21W and 5W across its two filaments, making it suitable for functions that require both a running light and a brighter signal output from a single housing.
The 194 is a miniature wedge bulb in the T10 form factor, operating at 12V and drawing 3.78W, which places it in the low-power range typical of marker and courtesy lighting applications.
The front side marker position on the Isuzu Amigo used the 194 bulb for model years 1989-1994.
For the 1998-2000 model years, the front side marker position on the Amigo shifted to the 1157 bulb, which carries a substantially higher wattage than the 194 it replaced in that position.
The rear side marker position on the Amigo used the 1157 bulb across all listed model years, spanning 1989-1994.
The BAY15d bayonet base of the 1157 features two offset pins at different heights, a design that prevents incorrect single-filament bulbs from being seated in its place, as the pin offset enforces correct polarity and filament alignment.
The T10 wedge base of the 194 is not interchangeable with the BAY15d bayonet base of the 1157, meaning the front and rear side marker sockets on 1989-1994 models are physically distinct from one another.
On 1998-2000 models, both the front side marker and the rear side marker position, had the rear been listed for those years, would share the same 1157 bulb type, whereas on 1989-1994 models the front and rear positions require two different bulb types.
There is a gap in the front side marker data between the 1994 and 1998 model years, with no entries present for 1995, 1996, or 1997 in the specifications provided.