Volvo S80 Back Up Light Bulb Size

The Volvo S80 back up light utilizes P21W and 1156 bulb sizes for the rear illumination system. Available data for the specified components covers the range from 1999 to 2016.

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
1999-2016	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 Volvo S80 uses the 1156 bulb size for the back up light across all model years from 1999 to 2016.
The 1156 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized industry standard in the United States and Canada.
The 1156 operates at 12 volts and 21 watts, which is consistent with standard automotive electrical systems.
The 1156 is a single-filament bulb, meaning it serves one lighting function only, as opposed to dual-filament types that handle two functions such as braking and running lights simultaneously.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a bayonet mount with a 15mm pin spacing and a single contact point at the base.
The BA15s base style requires a twist-and-lock installation rather than a screw-in method, which is a fitment detail relevant when sourcing a replacement.
Because the 1156 is a single-contact bayonet bulb, it is not interchangeable with the 1157, which shares a similar physical appearance but carries a dual-contact BA15d base for two-filament operation.