Honda Insight Back Up Light Bulb Size

The Honda Insight back up light requires a 921 bulb size for proper installation and function within the rear lighting assembly. Data for the specified component covers the range from 2000 to 2022.

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	US Type	EU Type	Shop
2019-2022	921	W16W	Check Price
2010-2014	921	W16W	Check Price
2000-2006	921	W16W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921	Check Price

Other Locations

Additional Notes

The Honda Insight uses the 921 bulb size across all listed model years for the back up light position.
The 921 bulb is a T15 wedge-type bulb, meaning it connects to its socket through a tapered plastic base rather than a bayonet or screw fitting.
This bulb operates at 12 volts and 16 watts, which is consistent with standard automotive electrical systems.
The 921 designation follows ANSI standards applicable in both the United States and Canada, indicating a regulated specification for base size, voltage, and wattage.
The T15 designation refers to the bulb's tubular envelope size, where the number 15 represents a width of 15/8 inches in the older ANSI sizing convention.
The wedge base design of the 921 makes it non-interchangeable with bayonet-base bulbs such as the 1156 or 1157, even when wattage ratings are similar.
The specifications cover model years 2000-2006 and 2010-2014, as well as 2019-2022, with the 921 bulb specified consistently across all of these ranges.