The Isuzu Rodeo brake light utilizes a 1157 bulb size for the rear lighting system on the vehicle. Provided information covers the period from 1991 through 2004 for the specified automotive component.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Isuzu Rodeo uses the 1157 bulb for the brake light position across all model years covered in the specifications, spanning 1991-2004.
The 1157 is a dual-filament bulb operating at 12V with a 21W/5W output and a BAY15d bayonet base. The dual-filament design allows a single bulb to serve both the brake light and tail light functions at different wattages.
The BAY15d bayonet base on the 1157 features two offset pins, which physically prevents it from being substituted with single-filament bayonet bulbs that share a similar base style but use a different pin configuration.
The center high mount stop light on the Isuzu Rodeo uses the 168 bulb for model years 1994-2004.
The 168 is a miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W. Its low wattage reflects its role as a supplemental brake indicator rather than a primary lighting source.
For the 1991-1993 Rodeo, the center high mount stop light uses the 1156 bulb instead of the 168, representing a different specification from later model years.
The 1156 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W. Its single-filament construction and BA15s base distinguish it from the dual-filament 1157, and the two are not interchangeable despite their physical similarity.
All three bulb types listed in the specifications, the 1157, 168, and 1156, conform to ANSI standards applicable in both the United States and Canada.
The 1157 and 1156 share the same 21W output on their primary filaments and both use bayonet-style bases, but their base configurations differ. The 1157 uses a BAY15d base with offset pins, while the 1156 uses a BA15s base with a single contact, making cross-substitution mechanically incorrect.
The shift from the 1156 to the 168 in the center high mount stop light between the 1993 and 1994 Rodeo represents a significant change in bulb type, moving from a 21W bayonet bulb to a 4.9W wedge bulb.