The Isuzu Hombre turn signal requires a 3157 bulb size for proper installation and function within the lighting assembly. Data for the specified component covers the range from 1996 to 2000.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Isuzu Hombre uses two distinct bulb types across its turn signal positions for the 1996-2000 model years: the 3157NA for the front and the 3057 for the rear.
Both the 3157NA and 3057 are ANSI-standardized dual-filament wedge bulbs of the T25 type, rated at 12V with a 27W/7W power split between their two filaments.
The dual-filament design in both positions allows a single bulb to serve more than one lighting function, with the higher 27W filament typically handling the turn signal or brake function and the lower 7W filament handling a secondary role such as running light duty.
The front turn signal on the Isuzu Hombre takes the 3157NA, which is distinguished from the standard 3157 by its natural amber glass envelope, producing an amber output without relying on a colored lens.
The rear turn signal uses the 3057, which shares the same T25 wedge base and 12V/27W/7W electrical ratings as the 3157NA but is housed in clear glass rather than amber-tinted glass.
Although the 3057 and 3157NA share the same base type and wattage ratings, they are not interchangeable without consideration of the lens color, since substituting a clear-glass bulb in a position designed for an amber output may affect compliance with lighting regulations.
The 3157NA and 3057 belong to the broader 3057/3157 bulb family, which shares a common wedge base but differs in filament orientation and pin configuration, meaning not all members of this family are drop-in replacements for one another.