Volvo VHD Back Up Light Bulb Size

The Volvo VHD back up light utilizes 1156 and P21W bulb sizes according to the provided technical specifications for the vehicle lighting system. Data for the specific components covers the range from 2001 through 2017.

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
2001-2017	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 VHD uses the 1156 bulb for the back up light across all listed model years from 2001 to 2017.
The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard used in both the United States and Canada.
The 1156 operates at 12 volts and 21 watts, which places it in the range typical of incandescent automotive signal and reverse lighting applications.
The bulb uses a BA15s bayonet base, which is a single-contact bayonet mount. The "s" in BA15s denotes a single center contact at the base, distinguishing it from dual-contact variants.
Because the 1156 is a single-filament bulb, it serves one lighting function only, unlike dual-filament types such as the 1157, which handle two functions through separate filaments.
The BA15s base of the 1156 is not interchangeable with the BA15d base found on dual-filament bulbs, even though the physical housing may appear similar. Substituting a dual-contact bulb into a single-contact socket would result in improper fitment.
The consistent use of the 1156 across the 2001-2017 Volvo VHD means that replacement bulbs sourced for any year within that range share the same socket type and electrical requirements.