Yugo GVX Back Up Light Bulb Size

The Yugo GVX back up light requires bulb size 1156 or P21W depending on the specific configuration of the vehicle. Data for the bulb sizes covers the range from 1987 to 1989.

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
1987-1989	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 the sole bulb type listed for the Yugo GVX back up light across the 1987-1989 model years.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail, within a single unit.
It operates on a 12-volt electrical system and draws 21 watts, which is typical of incandescent automotive reverse lighting applications.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, as opposed to the dual-pin BA15d variant.
The BA15s base is not interchangeable with the BA15d base, and substituting one for the other is not possible without a socket adapter.
The 1156 carries ANSI standardization recognized in both the United States and Canada, placing it within a regulated specification framework for electrical and photometric performance.