Honda CR-V Back Up Light Bulb Size

The Honda CR-V back up light utilizes 921 and 7440 bulb sizes depending on the specific version of the vehicle. Available data covers a range from 1997 through 2023 for the specified lighting components.

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
2017-2023	921	W16W	Check Price
2002-2016	7440	W21W	Check Price
1997-2001	921	W16W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921	Check Price
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440	Check Price

Other Locations

Additional Notes

The Honda CR-V backup light specifications reference two bulb types across all listed model years: the 921 and the 7440. Both are ANSI-standardized bulbs for the US and Canadian markets, and both use a wedge-style base rather than a bayonet or screw mount.
The 921 is a T15 wedge bulb rated at 12V and 16W. The T15 designation refers to the bulb's body size within the wedge family, and the 16W rating places it at a lower wattage output relative to the 7440.
The 7440 is a T20 single-filament wedge bulb rated at 12V and 21W. The T20 body is physically larger than the T15, and the single-filament designation distinguishes it from dual-filament variants such as the 7443, which shares the same T20 housing but serves different functions.
The Honda CR-V uses the 921 bulb for the 1997-2001 model years and again for the 2017-2023 model years, while the 7440 is specified for the 2002-2016 model years.
Because the T15 and T20 wedge bases differ in physical size, the 921 and 7440 are not interchangeable. Installing the incorrect bulb size risks a poor fit or failure to seat properly in the socket.
The wattage difference between the two bulbs is notable: the 7440 draws 21W compared to the 921's 16W. This difference is relevant when considering LED replacements, as LED equivalents are typically rated by lumen output rather than wattage, and the socket type must still match the original wedge base size.