Nissan Versa Back Up Light Bulb Size

The Nissan Versa back up light utilizes bulb sizes 7440NA, 921, and P21W depending on the specific configuration of the vehicle. Available data for the bulb sizes covers the range from 2013 to 2023.

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
2023	7440NA
2022	921
2021	P21W
2020	921
2013-2019	P21W

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T20), natural amber glass. 12V, 21W.	7440NA
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W

Other Locations

Additional Notes

The Nissan Versa backup light specifications reference three distinct bulb types across the 2013-2023 model years: the 7440NA, the 921, and the P21W.
The P21W is the most frequently specified bulb across these years, covering the 2013-2021 range with the exception of 2020, and operating at 12V with a 21W single-filament output.
The P21W follows the ECE standard, which is the regulatory framework used in Europe and most international markets, and it uses a BA15s bayonet base rather than a wedge-style fitting.
The 921 is a wedge-style bulb classified under the T15 form factor and follows the ANSI standard applicable to the US and Canadian markets. It operates at 12V and 16W, making it the lowest-wattage option among the three bulb types listed.
The 7440NA shares the same 12V, 21W electrical rating as the P21W but belongs to the T20 wedge form factor and carries a natural amber glass envelope, distinguishing it physically from the other two types.
The 7440NA and 921 are both ANSI-standard bulbs, while the P21W is an ECE-standard bulb. These two standards reflect different base and socket designs, meaning bulbs from one standard are not interchangeable with those from the other.
The 921 and 7440NA are both wedge-base bulbs, but their T15 and T20 form factors respectively indicate different physical sizes, and the two are not interchangeable with each other despite sharing the same base style.
The 2023 Nissan Versa uses the 7440NA, while the 2022 model uses the 921, representing a change in both bulb type and wattage between those two consecutive model years.
The 2020 model specifies the 921, while the surrounding 2019 and 2021 models specify the P21W, indicating that the 2020 Versa uses a different socket type than the years immediately adjacent to it.