Nissan NX Back Up Light Bulb Size

The Nissan NX back up light requires a unique bulb size of 1156 according to the provided specifications for the vehicle. Data for the bulb covers the range from 1991 to 1993.

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
1991-1993	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The 1156 is a single-filament bulb operating at 12 volts and 21 watts, built on a BA15s bayonet base. The BA15s designation indicates a single-contact bayonet fitting with a 15mm base width.
The 1156 follows ANSI standards recognized in both the United States and Canada, placing it within a widely adopted North American automotive lighting specification.
The Nissan NX uses the 1156 bulb for the back up light across the 1991-1993 model years.
Because the 1156 is a single-filament design, it serves a dedicated switching function rather than a dual-purpose role. Back up lights require only one filament since they activate solely when reverse gear is engaged.
The BA15s bayonet base is not interchangeable with the BA15d base, which is a dual-contact variant of the same 15mm bayonet fitting. Substituting a BA15d bulb in a BA15s socket would result in an improper fit.