Isuzu Rodeo Sport Back Up Light Bulb Size

The Isuzu Rodeo Sport back up light requires a bulb size of 921 for the rear illumination system. Data for the specified component covers the range from 2001 through 2003.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2001-2003	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

Other Locations

Additional Notes

The 921 bulb is the specified back up light size for the Isuzu Rodeo Sport across the 2001-2003 model years.
The 921 is an ANSI-standardized bulb type, meaning its physical and electrical characteristics conform to a defined North American specification used in both the United States and Canada.
The 921 uses a wedge-style base, classified under the T15 envelope designation. A wedge base relies on the tension of its contacts rather than a bayonet or screw mechanism to secure the bulb in its socket.
The T15 designation refers to the bulb's tubular glass envelope, with the numeric portion indicating a width of 15 eighths of an inch across the widest point of the glass.
The 921 operates at 12 volts, which is consistent with standard automotive electrical systems.
The bulb carries a 16-watt power rating, which determines the current draw from the vehicle's circuit and influences the brightness output of the back up light.
Because the 921 is an ANSI-standardized wedge bulb, it is produced by multiple manufacturers, and any unit meeting the T15 wedge form factor at 12V and 16W is electrically and physically interchangeable across all three listed model years of the Rodeo Sport.